Lone Star is our “family” geyser. We have seen it erupt each time our family has visited Yellowstone. Considering that it only erupts every 3-4 hours, back in the 70’s this was a feat to see the geyser.
Modern day viewing makes eruption predictions a little easier. You can call the ranger station and get yesterday’s eruption log and extrapolate when you think it will go.
In 2010, we were staying in West Yellowstone. So that is nearly a 30 minute drive (barring moose jams) and that is pushing it. When we arrived at the trailhead, we had to avoid a bull bison that thought it was his space. The trail was about 2 miles in. The last couple hundred yards we all ran because you could hear the geyser erupting.
A wonderful afternoon was spent, playing in the creek and lunching until we got to view a 2nd eruption before heading the long hike home.