Fountain Flat Drive is a hiking and biking trail in Teton County, Wyoming. It is within Yellowstone National Park. It is 3.9 miles long and begins at 7,241 feet altitude. Traveling the entire trail is 7.9 miles with a total elevation gain of 245 feet. Near the trailhead there are parkings. The River Geyser (elevation 7,244 feet) geyser can be seen along the trail.