This company offers half day or full day whitewater rafting trips, horseback riding, and ziplining. Buena Vista is a 50 min drive from the wedding venue. Even if not rafting, this is a gorgeous town to visit and has spectacular views of the Rocky Mountains.
https://raftbrownscanyon.com/
Soak in the relaxing Mt Princeton Hot Springs in Nathrop (13 min from Buena Vista). Day Pass prices listed on their website. There are geothermal pools located along the river.
https://mtprinceton.com/
There’s a street full of buildings to explore to give you an idea of life in a mining town between 1860 and 1900. That includes a two-in-one dentist/barber shop, an old brewery and schoolhouse, and the train depot.
Lots of hiking trails, restaurants, and shops to explore! You can rent bikes and ride around Lake Frisco or paddleboard on the lake with beautiful views surrounding you. This is a 40 min drive from the venue through Alma over Hosier Pass.
https://gobreck.com/
There are wonderful rock formations and hiking trails. This is located just past Tarryall Reservoir. Hiking trails around Lost Creek Wilderness are extensive and strenuous.