Best Time to Visit
The best lighting is typically in the morning when the rising sun lights up the geyser cone and as well as the forest behind it. You can, however find great light throughout the day especially on a day with broken clouds and soft diffused lighting.
As for time of year you can access Lone Star usually from Late April or May through October. During winter months you’ll have to take a Snowcoach to the Old Faithful area and then either snowshoe or cross-country ski in to the geyser.
So…how do you get there?
Lone Star Geyser is situated just apart from the Upper Geyser Basin in Yellowstone National Park. It is three miles from Old Faithful as a crow flies. The trailhead to access Lone Star is near Kepler Cascades on the main highway heading south towards Lake Yellowstone / Teton National Park. In order to reach the Geyser, you must walk down a fairly easy five mile (roundtrip) trail that used to be an old road but has since been closed to vehicle traffic. It’s an easy, flat hike that takes you through a lovely setting of mostly intact lodgepole pine forest.