Trailhead: 3.5 miles SE of the Old Faithful area, at Kepler Cascades parking area
Distance: 5 miles (8 km) roundtrip
Level of Difficulty: Easy
One of the easiest five mile roundtrip hikes in Yellowstone, this mostly level trail follows an old service road along the Firehole River through unburned forests of lodgepole pine. Lone Star geyser erupts approximately every three hours, and is a crowd pleaser. This trail can also be accessed by bicycle with the final approach to the geyser on foot.