Things to do nearHorsetooth Reservoir

Horsetooth Reservoir was created in the mid-twentieth century as part of the Colorado-Big Thompson Project, a large federal water diversion effort that brought water from the Western Slope across the Continental Divide to supply the drier Front Range. What began as an infrastructure project became one of northern Colorado's most visited outdoor destinations, a long, narrow lake tucked between the plains and the foothills with a personality shaped by both.

The reservoir spans roughly six miles in length, and its eastern shore rises sharply into the Horsetooth Mountain Open Space, a Larimer County park crisscrossed with trails for hiking, mountain biking, and rock climbing. The namesake rock formation, a pair of rounded sandstone outcroppings that resemble a horse's teeth, sits above the waterline and serves as a natural landmark visible from much of Fort Collins. Climbers of all skill levels find routes on the reservoir's surrounding cliffs, while trail runners and cyclists use the open space extensively throughout the warmer months.

On the water, Horsetooth Reservoir accommodates everything from fishing and motorized boating to sailing and non-motorized paddling. Anglers target walleye, bass, and trout in its depths, and the consistent afternoon winds make it a reliable spot for sailboats and windsurfers. Several boat ramps and designated swim beaches provide easy access along the shoreline, and the county park system maintains campgrounds nearby for those who want to extend their stay.

The setting combines the openness of the Great Plains with the drama of the Rocky Mountain foothills in a way that is specific to this stretch of Colorado, making Horsetooth Reservoir a place that earns repeated visits across every season.