https://strawberryhotsprings.com/
Amazing natural hot springs. There is a shuttle if you don't have a car.
https://www.alltrails.com/us/colorado/steamboat-springs
This site has a list of all the best trails around Steamboat. Here are some of our favorites:
Creekside
Mad Creek
Hot Springs Trail
Fish Creek Falls
Rabbit Ears Pass
Sarvis Creek Wilderness
Slavonia Trail/Golden Lake Trail (35 min drive north but worth it)
Steamboat is a great place for beginner and expert fly fishers alike. There are several guide outfits in Steamboat so feel free to look around, but we like the guys over at Steamboat Fly Fisher.
City owned links course, not recommended for the non-straight shooters.
Semi-private golf course that the sea-level individuals will crush the ball.
Looking to explore Steamboat on a bike? Backdoor Sports has daily bike rentals for street riders or those who want to go off-road.