Peter Sinks, Natural limestone sinkhole in Bear River Mountains, Utah.
Peter Sinks is a large bowl-shaped depression in the Bear River Mountains in northern Utah. The formation stretches roughly half a mile wide and one mile long at an elevation of about 8,200 feet.
Research student Zane Stephens from Utah State University first systematically documented the extreme temperature patterns at this location. His measurements revealed significant differences between the basin floor and its surrounding edges.
The Utah Climate Center collaborates with Campbell Scientific and Apogee Instruments to maintain monitoring stations for temperature data collection.
Multiple monitoring stations at different elevations throughout the basin help visitors understand how quickly conditions change with height. The best times to visit are during transition seasons when temperature differences are especially noticeable.
The basin floor remains free of trees while its edges are forested – a reversed pattern compared to normal mountains. This unexpected distribution arises from extreme cold conditions that form at depth and prevent tree growth.
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