Scott Carpenter Pool: While not a sauna, this public pool facility in Boulder is known for its inclusive environment. It's a place where people of all backgrounds are welcome.
HotBox Mobile Sauna: This is a mobile sauna service that might offer private sauna experiences. While not specifically gay-focused, services like these often cater to a diverse clientele.
Bunk House Lodge: Located in Breckenridge, not far from Boulder, this lodge is known for being lgbtq+-friendly. They might offer sauna facilities or can be a good reference for similar amenities in the area.
One Boulder Fitness: A fitness center in Boulder that might have sauna facilities. Fitness centers often provide an inclusive environment for all members.