This was the first of two tours we did with Rim at the end of May 2019, two days apart. We had to reschedule due to weather, which they accommodated happily. They sent us out with bikes fitted to us each personally based on weight and height, the bikes were brand new and worked perfectly. Our guide, Matt, was chill and friendly, and gave good instructions about how to use the bikes properly, including lots of tips on how to move your body and navigate obstacles. He also did a great job of making everyone on the 6-person tour (3 with my party and a mom and her 2 teenage sons) feel confident and capable. There was a bit of a wide range of ability and fitness level, and I think everyone would say they had a good experience. Overall, this trip is great for people with moderately good to high level fitness and endurance. It was easier than the Dead Horse trail we did 2 days later- we were really happy to have done Klondike first and the more technical one after we had a chance to get used to the equipment and physical demands. However, both trails were extremely physically challenging. We were very ready for the breaks to catch our breath at each trail fork. I definitely recommend this company!