High-end sport climbs, epic views, and a high likelihood of seeing some mountain goats.
Known as one of the most serene climbing areas in Montana, as well as some of the best sport climbing in the state, if you're a climber, Hellgate Gulch is worth the visit. Within 30 miles of Helena, you'll be climbing on limestone's funky pockets. There are plenty of climbing options, and most of them are sport climbs (which means they're bolted). Bring trad gear if you have it though as some climbs may be runout, and the cracks are always fun to get into.
Most of the climbs are decently difficult (5.9 and up). For more information about specific routes, here's the Mountain Project link for the area: https://www.mountainproject.com/area/107984928/hellgate-gulch
Hellgate Gulch is also home to mountain goats. If you're lucky, you may see them climbing around on a nearby gully!