# HIIT and weight lifting gyms in Denver > A gym that balances high-intensity training with enough space to actually lift heavy weights. Source: https://www.atly.com/united-states/colorado/denver/best-hiit-weight-lifting-gym ## Places (8) ### 1. Base6 Fitness Fitness center offers scalable HIIT workouts with thoughtful, varied classes that change daily. Atmosphere is welcoming and supportive, fostering a strong sense of community and encouragement among members of all skill levels. - Address: 3805 E Colfax Ave, Denver, CO 80206, USA - Atly: https://www.atly.com/location/Base6Fitness ### 2. Fit House Denver Fitness center combines welcoming atmosphere with supportive community and science-driven programs. Facility includes cold plunge, sauna, and recovery rooms for wellness and injury prevention. Energy stays motivating and non-judgmental, welcoming all ability levels. - Address: 888 S Jason St, Denver, CO 80223, USA - Atly: https://www.atly.com/location/FitHouseDenver ### 3. Traverse Fitness Gym offers a high-energy atmosphere with a strong sense of community and camaraderie that makes workouts feel like shared victories. Facilities include sauna, cold plunge, and coworking space, creating a human optimization hub beyond typical fitness centers. - Address: 2449 S Broadway, Denver, CO 80210, USA - Atly: https://www.atly.com/location/TraverseFitness ### 4. Duality Fitness center combines inclusive community with colorful lighting and lively music to create an uplifting atmosphere. Classes offer diverse, challenging workouts supported by encouraging participants. Puppies often appear in the lobby, adding a unique, welcoming touch. - Address: 4635 W Colfax Ave, Denver, CO 80204, USA - Atly: https://www.atly.com/location/Duality ### 5. Fit Collective Denver Fitness center offers a modern, clean space with sunrise views and a supportive, inclusive community. Group classes vary widely, catering to different fitness levels with thoughtful, accessible workouts. The atmosphere feels warm and welcoming, fostering camaraderie and motivation. - Address: 3857 Steele St #1182, Denver, CO 80205, USA - Atly: https://www.atly.com/location/FitCollectiveDenver ### 6. The FIIT co. Gym space includes multiple rooms with top-tier equipment and a circuit setup that lets people work at their own pace. Atmosphere stays inviting and energetic, fueled by fun music and a community focused on hard work and camaraderie. Classes vary from cardio to strength and boxing, offering challenging workouts suitable for all levels. - Address: 2110 Market St, Denver, CO 80205, USA - Atly: https://www.atly.com/location/The-FIIT-co ### 7. Endorphin Broadway Gym offers friendly community and inclusive atmosphere with small class sizes that encourage all skill levels. Energy stays fun and motivating while workouts remain challenging and adaptable to individual needs. - Address: 2288 S Broadway, Denver, CO 80210, USA - Atly: https://www.atly.com/location/EndorphinBroadway ### 8. Endorphin City Park Open workout areas combine with flexible class schedules and 24-hour access to support varied fitness routines. A welcoming community fosters a judgment-free zone where all levels exercise comfortably. Classes range widely from HIIT to yoga, each designed to be challenging yet inclusive. - Address: 3170 E Colfax Ave, Denver, CO 80206, USA - Atly: https://www.atly.com/location/EndorphinCityPark ## 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.