List
GridOpen Gym
12 - 6pm
12:00pm - 6:00pm
"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 JourneyBy 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
March events
Sindalu Ninja Games Recap: Huge success—thank you to our athletes, staff, and partners
International Women’s Day: 50% off day passes for all ladies
Skills Testing (Mar 20): Time to level up
Members Night (Mar 27): Pokémon Tournament, Trade Night & Costume Contest
Spring Break Ninja Camp (Mar 30–Apr 3): Limited spots available
Gym Update: Closed Thursdays starting March 12
Sindalu Ninja Games Recap: Huge success—thank you to our athletes, staff, and partners
International Women’s Day: 50% off day passes for all ladies
Skills Testing (Mar 20): Time to level up
Members Night (Mar 27): Pokémon Tournament, Trade Night & Costume Contest
Spring Break Ninja Camp (Mar 30–Apr 3): Limited spots available
Gym Update: Closed Thursdays starting March 12
🥷 Sindalu Ninja Games — Thank You!
The Sindalu Ninja Games were an incredible success this year. The level of competition, energy, and community support was amazing to see.
A huge thank you to all of our athletes, volunteers, staff members, and the Guam Ninja Association for helping make this event possible.
Relive the Ninja Games
Want to remember the experience?
We still have official event shirts available while supplies last.👉 Pick one up at the front desk before they’re gone.
🌸 International Women’s Day
To celebrate International Women’s Day, we’re inviting more women to try ninja training.
All ladies receive 50% off a day pass during the celebration.
Bring a friend, try the obstacles, and experience ninja training for yourself!
📈 Skills Testing – March 20
Skills Testing is your opportunity to demonstrate progress and move up in our Level Up system.
🎮 Members Night – March 27
Pokémon Tournament, Trade Night & Costume Contest
Join us for a fun, laid-back night with fellow members.
🔒 Members Only (active membership required)
Bring your deck, your best trades, and your favorite Pokémon costume!
🥷 Spring Break Ninja Camp – Mar 30 to Apr 3
Looking for a fun and active way to keep kids busy during spring break?
📅 Dates: March 30 – April 3
⏰ Time: 9:00 AM – 3:00 PM
👦 Ages: 6–13
💲 Price: $65 per daySpots are limited—reserve early.
📅 Gym Schedule Update
Starting March 12, 2026, the gym will be closed on Thursdays.
This change helps us manage facility maintenance, staff training, and program planning as the gym continues to grow.
Thank you for your understanding and 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.
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Frequently Asked Questions
Check out the most frequently asked questions about Guma i Sindalu Siha, LLC.
Still haven't found the answer?
Contact UsIs 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:
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Cleats or spiked shoes
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Flip flops, zorries, Crocs, or sandals
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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:
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🟦 Youth Levels 1–6 (Ages 6–15)
Our youth program is split into two training paths:
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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.
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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:
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🧠 Skill System – Learn core ninja skills and test your progress.
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🧗 Level Placement – Train in the right class for your current ability.
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🏅 Assessments & Promotions – Regular check-ins to celebrate your growth.
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🎯 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.
Katrina Perez
Joann Salas
Deren Perez
