My Dad and I purchased the Mountain Biking River Mountains/Hoover Dam with a 1/2 price coupon from Groupon. What a great deal! Our guide, Steve, was fantastic! He took good care of all 4 guests. This ride is great for all levels. The first part of the trail is pretty much downhill and paved. Once you hit the dam, it's gravel/dirt but mostly flat. We took scenic stops along the way, learned a lot about the area (plants and animals), saw a roadrunner, lizards, goats, etc. After the Hoover Dam, we headed back to a shaded park to eat a yummy lunch with the local goats. This was a highlight of our trip. Thank you!!!