We had a fun semi-challenging hike up to Crater Lake at Maroon Bells. Takes about an hour to get there from where the bus drops you at the ranger station. Awesome views and a lot of photographic vistas. Saw a fox. Rangers mentioned a black bear is seen up there often but we missed it. A lot of people on this hike and you do have to navigate rocks and boulders. Not for anyone with mobility issues. Ranger station offers walking poles to borrow. There’s a bus that takes you there from Aspen highlands and that is the only way to get there due to the popularity of this site. You can make your visit as challenging or chill as you want. The hike up to crater lake is an option but you see the Maroon Bells perfectly fine from the first lake you come upon less than a quarter mile from drop off point.