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green Lone Star Geyser Trail


2.8 mile 4.5 kilometer point to point


Ascent: 71' 22 m
Descent: -21' -6 m
High: 7,661' 2,335 m
Low: 7,610' 2,320 m


Avg Grade: 1% (0°)
Max Grade: 3% (2°)


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Trail shared by Tom Carter

Enjoy a pleasant trip along a serene stretch of the Firehole River to reach Lone Star Geyser.

Tom Carter

Features Geological Significance · Hot Spring · River/Creek

Family Friendly An easy, short trail over a safe paved path along a beautifully meandering Firehole River with a great geyser to watch at the end (but it requires patience to see).


The Lone Star Geyser Trail is located just south of Kepler Cascades on the Old Faithful to West Thumb road. This mostly paved path was used as an auto road until 1971. Today pedestrians and bicyclists enjoy a pleasant trip along a beautifully serene stretch of the Firehole River to reach Lone Star Geyser.

The trail closely follows the Firehole River through a forest partially burned by the 1988 fires. The man-made structures you'll notice in the river are part of an old drinking-water system for the Old Faithful area. The trail remains close to the river as it twists and turns its way past you to reach the Upper Geyser Basin. At the .5 mile mark the trail makes a bridged crossing of the river. At 1.6 miles the Spring Creek Trail joins from the left. Continue straight and follow the trail as it bends to the right and affords nice views of a small meadow through which the Firehole runs.

At the 2.5 mile mark, Lone Star Geyser is reached. Bicyclists will have to park their bikes at the bike rack before continuing to the geyser. As a Texan I was disappointed to learn that "Lone Star" Geyser was not named after my home state, but rather because it is a significant geyser that stands alone, away from the large concentration of geysers down river. Lone Star's 10-foot geyser cone is one of the largest in Yellowstone, indicating that this geyser has been erupting here for hundreds, perhaps thousands of years. And its 45 foot eruptions which shoot from the top of the cone are well worth the wait.

Lone Star Geyser erupts about every 3 hours. Look for the log book maintained by the Park Service to see if previous visitors have noted the time of the last eruption. The geyser itself will also give you a clue of its pending eruption. It generally begins splashing about 90 minutes prior to eruption and builds for the big event. Eruptions last about 5 minutes and are followed by a loud steam phase that can be heard a mile away.

The trail continues another .2 miles near a number of hot springs and small geysers and ends at a junction with the Shoshone Lake Trail and the Howard Eaton Trail to Old Faithful.

Thanks to guidebook author, Tom Carter, for sharing this trail description. To learn more about visiting Yellowstone, check out his book, Day Hiking Yellowstone.

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Need to Know, Dogs Allowed, Flora & Fauna


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Jun 26, 2019
Emilija L
Jun 22, 2019
Anna Ortung
Jun 18, 2019
Jinger Burton
Jun 12, 2019
Teresa Garner
Easy trail. Pavement the whole way. Geyser erupts about every 3 hours or so and the eruption last for twenty minutes.
Jun 5, 2019
Teresa Garner
A little wet and muddy in spots, but nothing troublesome.
Oct 17, 2018
Adam Benjamin
Waited a couple hours for the geyser. Saw a river otter on the way back. 2.8mi
Aug 10, 2018
Jason Crawford
Aug 10, 2018
Ralph Koeber
Arrived just as geyser started to erupt. stayed in the vicinity of the geyser and explored the river and other thermal features until Lone Star sto… 5.1mi

Trail Ratings

  4.6 from 7 votes


in Old Faithful


  4.6 from 7 votes
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