Bolton Notch State Park in Bolton, Connecticut, occupies a narrow pass on the divide between the Thames and Connecticut River watersheds and is valued for hiking, climbing, caves, and striking geology. Formed through deep geological time and reshaped by the retreat of the Laurentide Ice Sheet, the notch exposes schist, quartzite, gneiss, and several minerals. For at least 10,000 years, Indigenous peoples used this gap as a major travel corridor known as Saqumsketuck, possibly marking a boundary between Mohegan and Podunk territory. Later associated with local folklore, rail transport, and quarrying, the area became protected public land beginning in 1918.