Guma i Sindalu Siha, LLC

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"More Than Just Obstacles — 
We Build Confidence."

Discover Guam’s only Ninja Warrior gym — where kids, teens, and adults unleash their inner warrior.

💥 Ready to climb, swing, and conquer? Book your first visit and experience the ninja difference.

Start Your Ninja Journey

By opting in, you agree to receive periodic text messages & emails from Guma i Sindalu Siha, LLC. Your information will never be shared. Reply STOP to cancel. Standard rates may apply.

Classes for All Ages


Obstacle Training & Skills Progression

Parties, Events & Competitions

April events

  • Members Night (Apr 10): Movie Night

    Skills Testing (Apr 12): Next chance to unlock your skills

    Event Shirts Available: Limited Sindalu Ninja Games shirts still in stock

    Gym Reminder: Closed Thursdays

  • 🥷 Spring Break Ninja Camp — Thank You!

    Our Spring Break Ninja Camp was a blast! Campers spent the week climbing, swinging, balancing, and tackling ninja obstacles while building confidence and making new friends.

    A big thank you to all the campers and families who joined us. We love seeing so many kids staying active and challenging themselves.

    If you missed this camp, keep an eye out for future camps and school break events throughout the year.

    👕 Sindalu Ninja Games Event Shirts Still Available

    Missed out on the event shirt or want an extra?

    We still have a limited number of official Sindalu Ninja Games shirts available.

    👉 Stop by the front desk to grab yours before they’re gone.

    📈 Skills Testing – April 24

    Skills Testing is your next opportunity to demonstrate progress and move up in our Level Up system.

    Athletes will be evaluated by coaches to track their development and advance to the next level.

    If you've been working hard in class, this is your time to show your progress and level up.

    🎮 Members Night – April 10
    Movie Night - Wear comfy PJ's and bring your blankets/pillows 

    Watch a fan favorite film on the big screen, feel the fun atmosphere with friends and family.

    Gold Members: Free

    Non - Members: $5

    It's the perfect way to hang out and connect with the Ninja community.

    📅 Gym Reminder

    As a reminder, the gym is closed on Thursdays. We will also be closed on Sundays starting Apr 19 2026 

    This allows time for facility maintenance, staff training, and program development as we continue improving the gym for our athletes.

    Thank you for your continued support! 🥷

Why Choose Guma i Sindalu Siha?

As Guam’s first and only ninja warrior gym, we’re creating something special — a safe, high-energy space where kids, teens, and adults challenge themselves, overcome fear, and grow stronger inside and out.

From structured ninja classes and open gym sessions to epic events like the Sindalu Ninja Games, our programs are built to inspire, empower, and transform.

Join a community that lifts you up, pushes you forward, and celebrates every victory — big or small.

Frequently Asked Questions

Check out the most frequently asked questions about Guma i Sindalu Siha, LLC.


Still haven't found the answer?

Contact Us

Is there an age requirement?

Our gym is open to athletes ages 6 and up (seperate youth and Adult Classes). For safety and insurance, we do not currently offer classes for younger children.

Do I need to be in shape to start?

Not at all!
Our gym is built for all fitness levels. Whether you're new to exercise or an experienced athlete, we’ll meet you where you are. Every obstacle can be scaled or modified to suit your ability, and our supportive coaches are here to guide you every step of the way.

👟 What type of shoes should I wear?

Please wear closed-toe, lace-up athletic sneakers with a rubber sole.

🚫 Not allowed:

  • Cleats or spiked shoes

  • Flip flops, zorries, Crocs, or sandals

  • Indoor soccer shoes, hiking shoes, or boots

All birthday party participants and parents NEED to be wearing clean tennis, running, or athletic shoes.  We are a SHOES ON facility.  No crocs, slip-on, sandals, heels, or boots will be allowed.

What age groups do you offer classes for?

We offer structured ninja classes for athletes ages 6 and up, divided by age and skill level:

  • 🟦 Youth Levels 1–6 (Ages 6–15)

    Our youth program is split into two training paths:

    • Youth Novice (Levels 1–3) –Ages 6–11
      Focuses on foundational skills, safety, and confidence-building through fun and engaging challenges.

    • Youth Advanced (Levels 4–6) – Ages 12–15
      Introduces more technical skills, obstacle sequencing, and preparation for competitive events.

    🟥 Teen & Adult Levels 1–5 (Ages 16+)

    For beginners to advanced adults (and teens 16+), these classes are built for challenge, progress, and long-term growth.
    Each level focuses on strength, endurance, technique, and leadership development — whether you're training recreationally or aiming for competition.

    All athletes are placed into the appropriate level after an initial assessment or based on performance in class. Everyone has the opportunity to “level up” through our skills-based progression system.

Do you host birthday parties?

Absolutely! Celebrate with obstacle-based fun in our gym—complete with coach-led activities, team challenges, and equipment use. Contact us to book your date and go over party packages.

What’s included in the Level Up Program?

Our Level Up Program is a structured training system that helps you progress through skill-based levels — just like earning belts in martial arts!

It includes:

  • 🧠 Skill System – Learn core ninja skills and test your progress.

  • 🧗 Level Placement – Train in the right class for your current ability.

  • 🏅 Assessments & Promotions – Regular check-ins to celebrate your growth.

  • 🎯 Motivation & Milestones – Clear goals and fun ways to level up.

It’s the perfect path for athletes who want to build confidence, track progress, and get stronger over time.

What is Open Gym?

This is drop-in time where members can train independently on the obstacles or practice skills. A coach is on-site to assist, but sessions are self-guided.

What should I wear and bring to class?

Wear athletic clothes and lace-up sneakers (closed-toe, non marking shoes required), no crocs, slides, hiking, cleats, steel toe, etc. allowed. Bring lots of water, while we do not have a water refill station, we have bottled water for purchase for your convenience. Outside food can't be consumed on the gym floor.

What’s your cancellation and no-show policy?

Please cancel at least 6 hours before your class to avoid penalties. No-shows or late cancels may result in a fee and a loss of a session.

Do you offer camps or special training sessions?

Yes, we run seasonal camps (like summer camp) and workshops focusing on areas like obstacle technique, strength, and your ninja mindset.

How do I sign up for competitions?

You can register for our competitions, including the Sindalu Ninja Games, directly through our website or in person at the gym.
We host quarterly events and national qualifiers, and members receive priority registration and exclusive discounts.

What happens if someone damages equipment?

Accidents happen! We ask families and members to be responsible and report any issues. Damage caused by misuse may result in repair fees.

Can I bring my own food or celebrate on-site?

Birthday parties, Camps and special events with food must be scheduled in advance.

Otherwise, no food is allowed.  Drinks are allowed, but only in approved areas as we want to keep our obstacles clean and safe for everyone! We ask that all drinks be kept in designated areas.
For safety and hygiene, no food or beverages are allowed in the ninja or weight training zones and to make sure hands are clean before getting back on the obstacles.

 

Schedule

Schedule

04/12/2026 - 04/18/2026
12 Sun 13 Mon 14 Tue 15 Wed 16 Thu 17 Fri 18 Sat
12 Sun Closed
13 Mon Closed
14 Tue Closed
15 Wed Closed
16 Thu Closed
17 Fri Closed
18 Sat Closed
12:00am
1:00am
2:00am
3:00am
4:00am
5:00am
6:00am
7:00am
8:00am
9:00am
10:00am
11:00am
12:00pm
1:00pm
2:00pm
3:00pm
4:00pm
5:00pm
6:00pm
7:00pm
8:00pm
9:00pm
10:00pm
11:00pm

Open Gym

12 - 6pm
12:00pm - 6:00pm

Open Gym

Open Gym
Sunday, April 12 · 12:00pm - 6:00pm

Open Gym – Train Like a Ninja

Dial in your skills, test new obstacles, or just get in a great workout — this open gym is designed for ages 16+ who want to train at their own pace in a supportive ninja environment.

Details:

  • 💥 Separate Youth (6-15) and adults (16+) 

  • ✅ Access to all designated training zones

  • ✅ Staff present for safety and supervision

  • ⏱ 2-hour or Unlimited options available

  • 🎯 Ideal for independent training or skill progression

Note:
No formal coaching provided during Open Gym. Waiver required prior to participation.
Must book in person.

This day is marked as closed. Reopen the day to edit or restore sessions.

Youth Novice (Lv. 1-2)

4:30 - 5:30pm
4:30pm - 5:30pm

Youth Novice (Lv. 1-2)

KPKatrina Perez JSJoann Salas Katrina, Joann
Youth Novice (Lv. 1-2)
Monday, April 13 · 4:30pm - 5:30pm
Instructors:
Katrina Perez Joann Salas

Youth Novice Ninja (Ages 6–10)

Introductory-level class designed for beginner ninjas.
This class focuses on developing coordination, balance, strength, and confidence through fun and safe obstacle challenges. Perfect for first-timers or younger athletes learning the basics of Ninja Warrior-style movement. Each week includes skill progressions and age-appropriate drills that promote focus and body control.

🔹 No experience needed
🔹 Capped at 8–10 students per instructor for safety and engagement

IMPORTANT: Please use participants name when booking

This day is marked as closed. Reopen the day to edit or restore sessions.

Youth Advanced (Lv. 3-6)

5:30 - 6:30pm
5:30pm - 6:30pm

Youth Advanced (Lv. 3-6)

DPDeren Perez JSJoann Salas Deren, Joann
Youth Advanced (Lv. 3-6)
Monday, April 13 · 5:30pm - 6:30pm
Instructors:
Deren Perez Joann Salas

Youth Advanced Ninja (Ages 11–15)

Progressive-level class for returning or older youth ninjas.
This class introduces more complex techniques, strength conditioning, and dynamic obstacles. Athletes build on foundational skills while working on grip strength, precision, and strategy. Suitable for students with prior ninja experience or athletic background in gymnastics, parkour, or climbing.

🔹 Coach approval or prior experience recommended
🔹 Focused on skill-building and competition prep
🔹 Capped at 10–12 students per instructor

IMPORTANT: Please use participants name when booking

This day is marked as closed. Reopen the day to edit or restore sessions.

Adult Ninja Class

6:30 - 7:30pm
6:30pm - 7:30pm

Adult Ninja Class

DPDeren Perez
Adult Ninja Class
Monday, April 13 · 6:30pm - 7:30pm
Instructors:
Deren Perez

Adult Ninja Warrior (Ages 16+)

All-levels class for adults from first-timers to advanced ninjas.
Whether you're just starting your ninja journey or training for competition, this class has something for you. We begin with fundamentals: bodyweight control, grip strength, obstacle basics, and safety techniques. As you progress, you'll take on more complex challenges like laches, warped walls, salmon ladders, and dynamic courses.

Coaches adjust for all levels and provide personal guidance based on ability. Build strength, confidence, and obstacle mastery at your pace — or get ready for the next Ninja competition.

🔹 Beginner-friendly & competition-prep ready
🔹 Modifications and progressions provided at every level
🔹 Great for fitness-focused adults or aspiring Ninja Warriors

IMPORTANT: Please use participants name when booking

This day is marked as closed. Reopen the day to edit or restore sessions.

Skills Lab

7:30 - 9pm
7:30pm - 9:00pm

Skills Lab

Skills Lab
Monday, April 13 · 7:30pm - 9:00pm

Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature “Level-Up” program. Whether you’re perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.

IMPORTANT: Please use participants name when booking

This day is marked as closed. Reopen the day to edit or restore sessions.

Youth Novice (Lv. 1-2)

4:30 - 5:30pm
4:30pm - 5:30pm

Youth Novice (Lv. 1-2)

KPKatrina Perez JSJoann Salas Katrina, Joann
Youth Novice (Lv. 1-2)
Tuesday, April 14 · 4:30pm - 5:30pm
Instructors:
Katrina Perez Joann Salas

Youth Novice Ninja (Ages 6–10)

Introductory-level class designed for beginner ninjas.
This class focuses on developing coordination, balance, strength, and confidence through fun and safe obstacle challenges. Perfect for first-timers or younger athletes learning the basics of Ninja Warrior-style movement. Each week includes skill progressions and age-appropriate drills that promote focus and body control.

🔹 No experience needed
🔹 Capped at 8–10 students per instructor for safety and engagement

This day is marked as closed. Reopen the day to edit or restore sessions.

Youth Advanced (Lv. 3-6)

5:30 - 6:30pm
5:30pm - 6:30pm

Youth Advanced (Lv. 3-6)

DPDeren Perez JSJoann Salas Deren, Joann
Youth Advanced (Lv. 3-6)
Tuesday, April 14 · 5:30pm - 6:30pm
Instructors:
Deren Perez Joann Salas

Youth Advanced Ninja (Ages 11–15)

Progressive-level class for returning or older youth ninjas.
This class introduces more complex techniques, strength conditioning, and dynamic obstacles. Athletes build on foundational skills while working on grip strength, precision, and strategy. Suitable for students with prior ninja experience or athletic background in gymnastics, parkour, or climbing.

🔹 Coach approval or prior experience recommended
🔹 Focused on skill-building and competition prep
🔹 Capped at 10–12 students per instructor

This day is marked as closed. Reopen the day to edit or restore sessions.

Ninja Fit

6:30 - 7:30pm
6:30pm - 7:30pm

Ninja Fit

DPDeren Perez
Ninja Fit
Tuesday, April 14 · 6:30pm - 7:30pm
Instructors:
Deren Perez

Spartan/OCR Conditioning (Ages 16+)

Obstacle Course Race-focused training for Spartan athletes and weekend warriors.
This class blends strength, cardio, and grip-intensive conditioning tailored to the demands of Spartan Races and OCR events. You'll rotate through circuits involving carries, crawls, rope climbs, walls, rig stations, and running intervals — all designed to improve endurance, obstacle technique, and mental grit.

Whether you're training for your first 5K Spartan Sprint or aiming to crush a Beast, this class will push your limits and prepare you for race day.

🔹 All levels welcome — workouts scaled by ability
🔹 Emphasis on real-world OCR obstacle simulation
🔹 Great cross-training for Ninja athletes

This day is marked as closed. Reopen the day to edit or restore sessions.

Skills Lab

7:30 - 9pm
7:30pm - 9:00pm

Skills Lab

Skills Lab
Tuesday, April 14 · 7:30pm - 9:00pm

Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature “Level-Up” program. Whether you’re perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.

IMPORTANT: Please use participants name when booking

This day is marked as closed. Reopen the day to edit or restore sessions.

Youth Novice (Lv. 1-2)

4:30 - 5:30pm
4:30pm - 5:30pm

Youth Novice (Lv. 1-2)

KPKatrina Perez JSJoann Salas Katrina, Joann
Youth Novice (Lv. 1-2)
Wednesday, April 15 · 4:30pm - 5:30pm
Instructors:
Katrina Perez Joann Salas

Youth Novice Ninja (Ages 6–10)

Introductory-level class designed for beginner ninjas.
This class focuses on developing coordination, balance, strength, and confidence through fun and safe obstacle challenges. Perfect for first-timers or younger athletes learning the basics of Ninja Warrior-style movement. Each week includes skill progressions and age-appropriate drills that promote focus and body control.

🔹 No experience needed
🔹 Capped at 8–10 students per instructor for safety and engagement

This day is marked as closed. Reopen the day to edit or restore sessions.

Youth Advanced (Lv. 3-6)

5:30 - 6:30pm
5:30pm - 6:30pm

Youth Advanced (Lv. 3-6)

DPDeren Perez JSJoann Salas Deren, Joann
Youth Advanced (Lv. 3-6)
Wednesday, April 15 · 5:30pm - 6:30pm
Instructors:
Deren Perez Joann Salas

Youth Advanced Ninja (Ages 11–15)

Progressive-level class for returning or older youth ninjas.
This class introduces more complex techniques, strength conditioning, and dynamic obstacles. Athletes build on foundational skills while working on grip strength, precision, and strategy. Suitable for students with prior ninja experience or athletic background in gymnastics, parkour, or climbing.

🔹 Coach approval or prior experience recommended
🔹 Focused on skill-building and competition prep
🔹 Capped at 10–12 students per instructor

This day is marked as closed. Reopen the day to edit or restore sessions.

Adult Ninja Class

6:30 - 7:30pm
6:30pm - 7:30pm

Adult Ninja Class

DPDeren Perez
Adult Ninja Class
Wednesday, April 15 · 6:30pm - 7:30pm
Instructors:
Deren Perez

Adult Ninja Warrior (Ages 16+)

All-levels class for adults from first-timers to advanced ninjas.
Whether you're just starting your ninja journey or training for competition, this class has something for you. We begin with fundamentals: bodyweight control, grip strength, obstacle basics, and safety techniques. As you progress, you'll take on more complex challenges like laches, warped walls, salmon ladders, and dynamic courses.

Coaches adjust for all levels and provide personal guidance based on ability. Build strength, confidence, and obstacle mastery at your pace — or get ready for the next Ninja competition.

🔹 Beginner-friendly & competition-prep ready
🔹 Modifications and progressions provided at every level
🔹 Great for fitness-focused adults or aspiring Ninja Warriors

This day is marked as closed. Reopen the day to edit or restore sessions.

Skills Lab

6:30 - 8pm
6:30pm - 8:00pm

Skills Lab

Skills Lab
Wednesday, April 15 · 6:30pm - 8:00pm

Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature “Level-Up” program. Whether you’re perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.

IMPORTANT: Please use participants name when booking

This day is marked as closed. Reopen the day to edit or restore sessions.

CLOSED Early

8 - 9pm
8:00pm - 9:00pm

CLOSED Early

CLOSED Early
Wednesday, April 15 · 8:00pm - 9:00pm

This day is marked as closed. Reopen the day to edit or restore sessions.

Closed

4 - 9pm
4:00pm - 9:00pm

Closed

Closed
Thursday, April 16 · 4:00pm - 9:00pm

This day is marked as closed. Reopen the day to edit or restore sessions.

Youth Novice (Lv. 1-2)

4:30 - 5:30pm 2 / 12
4:30pm - 5:30pm

Youth Novice (Lv. 1-2)

Bookings: 2/12
KPKatrina Perez JSJoann Salas Katrina, Joann
Youth Novice (Lv. 1-2)
Friday, April 17 · 4:30pm - 5:30pm
Instructors:
Katrina Perez Joann Salas

Youth Novice Ninja (Ages 6–10)

Introductory-level class designed for beginner ninjas.
This class focuses on developing coordination, balance, strength, and confidence through fun and safe obstacle challenges. Perfect for first-timers or younger athletes learning the basics of Ninja Warrior-style movement. Each week includes skill progressions and age-appropriate drills that promote focus and body control.

🔹 No experience needed
🔹 Capped at 8–10 students per instructor for safety and engagement

This day is marked as closed. Reopen the day to edit or restore sessions.

Youth Advanced (Lv. 3-6)

5:30 - 6:30pm 0 / 12
5:30pm - 6:30pm

Youth Advanced (Lv. 3-6)

Bookings: 0/12
DPDeren Perez JSJoann Salas Deren, Joann
Youth Advanced (Lv. 3-6)
Friday, April 17 · 5:30pm - 6:30pm
Instructors:
Deren Perez Joann Salas

Youth Advanced Ninja (Ages 11–15)

Progressive-level class for returning or older youth ninjas.
This class introduces more complex techniques, strength conditioning, and dynamic obstacles. Athletes build on foundational skills while working on grip strength, precision, and strategy. Suitable for students with prior ninja experience or athletic background in gymnastics, parkour, or climbing.

🔹 Coach approval or prior experience recommended
🔹 Focused on skill-building and competition prep
🔹 Capped at 10–12 students per instructor

This day is marked as closed. Reopen the day to edit or restore sessions.

Adult Ninja Class

6:30 - 7:30pm 0 / 20
6:30pm - 7:30pm

Adult Ninja Class

Bookings: 0/20
DPDeren Perez
Adult Ninja Class
Friday, April 17 · 6:30pm - 7:30pm
Instructors:
Deren Perez

Adult Ninja Warrior (Ages 16+)

All-levels class for adults from first-timers to advanced ninjas.
Whether you're just starting your ninja journey or training for competition, this class has something for you. We begin with fundamentals: bodyweight control, grip strength, obstacle basics, and safety techniques. As you progress, you'll take on more complex challenges like laches, warped walls, salmon ladders, and dynamic courses.

Coaches adjust for all levels and provide personal guidance based on ability. Build strength, confidence, and obstacle mastery at your pace — or get ready for the next Ninja competition.

🔹 Beginner-friendly & competition-prep ready
🔹 Modifications and progressions provided at every level
🔹 Great for fitness-focused adults or aspiring Ninja Warriors

This day is marked as closed. Reopen the day to edit or restore sessions.

Skills Lab

6:30 - 8pm 0
6:30pm - 8:00pm

Skills Lab

Bookings: 0
Skills Lab
Friday, April 17 · 6:30pm - 8:00pm

Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature “Level-Up” program. Whether you’re perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.

IMPORTANT: Please use participants name when booking

This day is marked as closed. Reopen the day to edit or restore sessions.

Skills Lab

7:30 - 9pm 0 / 30
7:30pm - 9:00pm

Skills Lab

Bookings: 0/30
Skills Lab
Friday, April 17 · 7:30pm - 9:00pm

Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature “Level-Up” program. Whether you’re perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.

IMPORTANT: Please use participants name when booking

This day is marked as closed. Reopen the day to edit or restore sessions.

CLOSED Early

8 - 9pm
8:00pm - 9:00pm

CLOSED Early

CLOSED Early
Friday, April 17 · 8:00pm - 9:00pm

This day is marked as closed. Reopen the day to edit or restore sessions.

Open Gym

12 - 6pm
12:00pm - 6:00pm

Open Gym

Open Gym
Saturday, April 18 · 12:00pm - 6:00pm

Open Gym – Train Like a Ninja

Dial in your skills, test new obstacles, or just get in a great workout — this open gym is designed for ages 16+ who want to train at their own pace in a supportive ninja environment.

Details:

  • 💥 Separate Youth (6-15) and adults (16+) 

  • ✅ Access to all designated training zones

  • ✅ Staff present for safety and supervision

  • ⏱ 2-hour or Unlimited options available

  • 🎯 Ideal for independent training or skill progression

Note:
No formal coaching provided during Open Gym. Waiver required prior to participation.
Must book in person.

This day is marked as closed. Reopen the day to edit or restore sessions.

Adult Course runs

6 - 9pm 0 / 20
6:00pm - 9:00pm

Adult Course runs

Bookings: 0/20
DPDeren Perez
Adult Course runs
Saturday, April 18 · 6:00pm - 9:00pm
Instructors:
Deren Perez

Adult Course Run Nights – Train Like a Pro

Put your skills to the test on a full-length ninja course designed for teens and adults. Adult Course Run Nights are structured but self-driven sessions focused on flowing through obstacles, building endurance, and preparing for competitions.

Details:

✅ Access to a designated adult-level ninja course
✅ Course resets and flow-focused training
✅ No formal coaching — self-paced runs encouraged
✅ Staff present for safety and course management

📍 Recommended for ages 15+ 
Duration: 4 hours of course runs and good vibes

Important:
Participants must have a signed waiver on file. This session is intended for experienced youth and adult athletes. No open gym during this time.

This day is marked as closed. Reopen the day to edit or restore sessions.

CLOSED Early

6 - 10pm
6:00pm - 10:00pm

CLOSED Early

CLOSED Early
Saturday, April 18 · 6:00pm - 10:00pm

This day is marked as closed. Reopen the day to edit or restore sessions.

No sessions found