# HIIT workouts in Colorado > Pushing through a high-intensity interval training session is the only way to clear the head. Source: https://www.atly.com/united-states/colorado/best-hiit ## Places (16) ### 1. Base6 Fitness Fitness center offers scalable HIIT workouts with daily varied classes. Intense HIIT sessions focus on athleticism and strength. Atmosphere is welcoming and supportive, building a strong community for all skill levels. - Address: 3805 E Colfax Ave, Denver, CO 80206, USA - Atly: https://www.atly.com/location/Base6Fitness ### 2. Traverse Fitness Gym buzzes with high-energy atmosphere and strong community spirit. HIIT with Adam pushes your limits with intense endurance challenges. Facilities like sauna and cold plunge boost recovery, making it a true human optimization hub. - Address: 2449 S Broadway, Denver, CO 80210, USA - Atly: https://www.atly.com/location/TraverseFitness ### 3. BFT Highlands Ranch Fitness center blends science-based programming with intense HIIT sessions that mix cardio and strength. Coaches bring positive energy and motivating music. Workouts suit all levels with varied, challenging classes. - Address: 9370 S Colorado Blvd Unit A-14, Highlands Ranch, CO 80126, USA - Atly: https://www.atly.com/location/BFTHighlandsRanch ### 4. Duality Fitness center shines with colorful lighting and lively music that boost energy. HIIT classes blend strength training and cardio for a tough, balanced workout. Friendly community and puppies in the lobby make every visit welcoming and fun. - Address: 4635 W Colfax Ave, Denver, CO 80204, USA - Atly: https://www.atly.com/location/Duality ### 5. The FIIT co. Gym offers top-tier equipment and an energetic vibe with fun music. Jeff's intense HIIT classes and kettlebell sessions push limits. Community spirit and varied classes make workouts both challenging and welcoming. - Address: 2110 Market St, Denver, CO 80205, USA - Atly: https://www.atly.com/location/The-FIIT-co ### 6. Fit Collective Denver Fitness center shines with sunrise views and a supportive community. Group classes suit all levels with accessible workouts. HIIT sessions are intense and challenging, blending circuit and lifting formats for variety. - Address: 3857 Steele St #1182, Denver, CO 80205, USA - Atly: https://www.atly.com/location/FitCollectiveDenver ### 7. Manic Training Highlands Ranch Gym Gym offers a supportive community with coaches like Pete joining workouts. Classes mix HIIT and strength for heart health and muscle building. Energy stays high and motivating with options for all skill levels. - Address: 2000 E County Line Rd # 2000B, Highlands Ranch, CO 80126, USA - Atly: https://www.atly.com/location/ManicTrainingHighlandsRanchGym ### 8. Unite Fitness Group Training Golden Fitness center offers an intimate space with upbeat energy and a welcoming community. HIIT classes feature varied workouts led by local instructors in a supportive group setting. Studio blends strength and yoga for balanced training and recovery. - Address: 2600 East St, Golden, CO 80401, USA - Atly: https://www.atly.com/location/UniteFitnessGroupTrainingGolden ### 9. VASA Fitness Huge gym offers Studio Red HIIT classes led by expert coaches. Spacious areas include a pool and sauna for recovery. Friendly vibe and multiple amenities make workouts enjoyable and varied. - Address: 3020 N Nevada Ave, Colorado Springs, CO 80907, USA - Atly: https://www.atly.com/location/VASAFitness28 ### 10. Cerus Fitness Gym offers intense HIIT sessions and high-quality equipment for all fitness levels. Boxing classes bring high energy and challenge while the space fosters a supportive community that welcomes everyone. Open all day, it suits both group and solo workouts. - Address: 3771 Monarch St Unit F&G, Frederick, CO 80516, USA - Atly: https://www.atly.com/location/CerusFitness ### 11. The Gym Colorado Powerlifting gym offers 24/7 access with no wait for equipment. Workouts blend strength training and HIIT programming for a balanced routine. Friendly community creates a welcoming atmosphere for all skill levels. - Address: 10155 E 29th Dr Ste 130, Denver, CO 80238, USA - Atly: https://www.atly.com/location/TheGymColorado ### 12. Fit House Denver Fitness center offers science-driven programs with a supportive community and a welcoming atmosphere. HIIT classes feature kickboxing and strength training in well-equipped spaces. Recovery options include cold plunge and infrared saunas for wellness and injury prevention. - Address: 888 S Jason St, Denver, CO 80223, USA - Atly: https://www.atly.com/location/FitHouseDenver ### 13. Endorphin Broadway Gym features a friendly community and small class sizes that suit all skill levels. Workouts mix cycling, rowing, and body weight moves for a full-body workout. Sessions use HIIT, Tabata, and boot camp styles with weights and bands for high intensity. - Address: 2288 S Broadway, Denver, CO 80210, USA - Atly: https://www.atly.com/location/EndorphinBroadway ### 14. Endorphin City Park Open workout areas and 24-hour access support varied fitness routines. Classes include HIIT, yoga, and boxing, all designed to be challenging yet inclusive. A welcoming community creates a judgment-free zone for all levels. - Address: 3170 E Colfax Ave, Denver, CO 80206, USA - Atly: https://www.atly.com/location/EndorphinCityPark ### 15. HOTWORX - Colorado Springs, CO - Dublin Infrared heated saunas offer a warm atmosphere with small class sizes for personalized workouts. HIIT sessions blend intense exercises with yoga inside the sauna for a unique fitness experience. Members enjoy 24/7 secure access and a laid-back, respectful vibe. - Address: 6545 Issaquah Dr, Colorado Springs, CO 80923, USA - Atly: https://www.atly.com/location/HOTWORX---Colorado-Springs-CO---Dublin ### 16. 212 Performance Gym Gym offers a friendly community with top gear like the air runner treadmill. HIIT classes mix strength training and cardio, blending Crossfit and weightlifting. Indoor and outdoor spaces keep workouts fresh and motivating. - Address: 7399 S Tucson Way STE C3, Centennial, CO 80112, USA - Atly: https://www.atly.com/location/212PerformanceGym ## Get this data directly This page comes from the Atly Places API, which scores close to 2 million places against more than 1,400 intents — "nice view", "work friendly", "gluten free", "dog friendly" — from what real reviewers say, with the statements behind every score. - **MCP server:** `https://agentic-api.atly.com/mcp` — connect it in ChatGPT or Claude. Nothing to install. - **Guide for agents:** - **OpenAPI contract:** - **No key needed to start.** `POST https://agentic-api.atly.com/v0/keys` with an email raises the quota. Coverage is densest in the United States, with pockets in Mexico, Israel and Thailand.