Harvey Gap State Park, State park near Rifle, Colorado

Harvey Gap State Park is a recreation area with a reservoir near Rifle in western Colorado's mountainous terrain. The site spans over 300 acres of natural landscape surrounding a large water storage lake, bordered by wooded hills and ridge formations.

Harvey Gap State Park was founded in 1987, the same year Colorado designated it a state park. Its centerpiece, Grass Valley Reservoir, is a 190-acre impoundment when full, held back by a dam across a drainage of the Grand Hogback area. The reservoir made year-round fishing possible and remains the park's main draw.

Local families gather here year-round for picnics and outdoor activities along the water's edge. The place serves as a gathering spot where people from the area spend time together in nature.

The park is easy to walk through, with wide paths along the water and areas for fishing and swimming. Visitors should come during warmer months since winters at this elevation are cold and snowy.

Grass Valley Reservoir holds 190 acres when full and fishing is allowed all year, which is why anglers come even in winter. The park was founded in 1987 and limits boating to restricted use, so the water stays given over mainly to fishing.