Super awesome!! Look past the decrepid hotel and horrifying cigarette smoke when you check in, inside the Hacienda Hotel adjacent to the Hoover Dam.
It's not the most organized or professional business set-up....but that's not what this review is for...it's for the tour itself. It's AWESOME!! You get out on the Colorado RIver which is about 55 degrees in contrast with the hot summer day is most refreshing. This is a wonderful tour dashed with adventure, peaceful rafting and history about one of Nevada/Arizona's historical mammoths.
You end in Arizona, they bus you back.
Bring a hat, good shoes that have grip on them, camera with water-proofed wrapping, lunch is provided (not that great :/) and sunscreen, you're in direct sun 99% of the time.
Bring your bathing suit if you want to take a dip, they stop the raft for lunch and you can swim and/or eat.
Love it, check this out for something unique ;)