Lake Powell draws recreational boaters like kids to a candy store. Surrounded by the attractive high desert landscape that’s shared between Arizona and Utah, the lake provides a bright splash of blue amongst the gorgeous rustic shades of the colored canyons and buttes. Being such a famous houseboating hotspot, you probably already know everything there is to know about Lake Powell.

Or do you? Here are ten cool facts shared by LakePowell.org to test just how well you know this desert lake:

1. 13% of the Glen Canyon Recreational Area is claimed by Lake Powell’s clear water, which stretches out for 186 miles.

2. The namesake of Lake Powell was Civil War veteran and one-armed explorer John Wesley Powell. This man is known for leading a scientific expedition in wooden boats through the Grand Canyon back in 1869.

3. After Glen Canyon Dam was formed, it took 17 years to fill Lake Powell to "full pool" capacity. 

4. Lake Powell is in the big league of our nation’s man-made reservoirs, ranking in as the second biggest with a storage capacity of 27,000,000 acre-feet.

5. Glen Canyon Dam, which first formed the lake, looms 710 feet above the Colorado River.

6. Glen Canyon Dam helps provide affordable electric power throughout at least four states: Utah, Colorado, Arizona and New Mexico. 

7. How many people visit Lake Powell and Glen Canyon National Recreation Area? Over 3 million!

8. The length of an average visitor’s stay is the longest of any federal park, clocking in at 4.5 days.

9. Rainbow Bridge National Monument, arguably the most famous site on the lake, is the largest natural bridge in the entire world.

10. Before Lake Powell was formed, visitors who wanted to see Rainbow Bridge embarked on a long, difficult hike or horseback ride. It was a nice trade for the ease of today’s boat ride there.