The Henrys Lake Mountains are a mixture of Paleozoic sedimentary rocks and volcanic materials including rhyolite and basalt with some Precambrian metamorphic rocks thrown in for good measure. The range, which was forced up with the uplifting of the Rocky Mountains, has most recently been shaped by glaciation and the nearby Henrys Fork and Island Park calderas and the collapsed … Continue reading

Mount Two Top

This peak is not in the book. This Peak is located on the east side of Henrys Lake. Rick Baugher writes that this peak is “one of Island Park, Idaho’s most popular mountains. It is a coveted winter destination for snowmachiner and skier alike. USGS Big Springs   … Continue reading

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