Mouse's Tank is a body of water inside of Valley of Fire State Park. This water is located at the end of the trail. The trail is 0.7 miles. It is an in and back trail. Here is a link to the trails within the Valley of Fire State Park http://parks.nv.gov/forms/Valley_of_Fire_Map_1_SE_HWY_162_NET_otln_reduced_2014-02-10.pdf. This trail is mostly soft sand, which can be tiring. Especially if wearing the wrong type of shoes. There are bathrooms here. And a picnic area across the road from the trail head.