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  Lone Star Geyser
Feature Type: Geyser
Geyser/Spring Type: Cone geyser

Basin
Lone Star Geyser Basin
Complex
Lone Star Group

Lone Star is indeed the star of its basin. It erupts from a huge, beautiful cone on an interval very close to 3 hours that seems unaffected by any other geyser's activity, although it's hard to tell for sure as reports of closed intervals are rare. Major eruptions can last 30 minutes, reach 45 feet in height, and end in a dramatic steam phase. Majors are usually preceded by one (sometimes more) minor eruption that reaches similar heights but only lasts 5 minutes or so. The major usually occurs about half an hour after the minor, introduced by increasingly heavy splashing.

Time was when Lone Star could be approached closely from one's automobile. Today it's a hike (or combined bike/hike) along an old road from a parking lot at Kepler Cascades, south of the Old Faithful complex. There is normally a logbook in a box at the viewing area; if you're the only ones who witness a Lone Star eruption, do other gazers a favor and indicate the start time -- the next eruption is very likely to be almost exactly three hours later.

What to look for:
Lone Star is so punctual that the best thing to "look for" is a logbook entry giving the time of the previous eruption; just add three hours (or a bit less to allow for deviations from the mean) and wait for good things to happen at the appointed hour. If there is no recent logbook entry, best is to wait for splashing to build into a minor eruption. Most likely a major will follow about half an hour later, heralded by a resumption of increasingly heavy splashing. Again, please make a logbook entry so that those who follow you can make their own viewing plans.







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