Full disclosure, I'm a dues-paying member and active volunteer.
They basically provide Search and Rescue (SAR) "lite" and vehicle recovery on Colorado Forest Service roads and Jeep trails free of charge. They try very hard to not compete with either traditional SAR teams or commercial towing services and instead fill a gap between the two.
Having personally been on 60+ missions over the past two years, they're doing incredibly good work helping people out on their worst day, reducing the burden on traditional SAR teams, and in more than a few cases saving lives. At least 50% of the missions I've been on have been people that simply got in over their head and didn't know what to do. Being able to get them and their vehicle home is a fantastic feeling.
edit: A lot of SAR teams are self-funded or funded via grant money that can disappear, so if you can donate to a local team please do. They desperately need the funding to continue doing the work of saving lives