Harvey Gap State Park in Garfield County, Colorado. The reservoir is called Grass Valley Reservoir.
Harvey Gap State Park in Garfield County, Colorado. The reservoir is called Grass Valley Reservoir. Jeffrey Beall · CC BY 4.0

Harvey Gap State Park

State Park · Colorado · Colorado Parks and Wildlife

Plan your visit

Know before you go

Official site
cpw.state.co.us
Managed by
Colorado Parks and Wildlife

Getting there

Directions on Google Maps →

What's here

Activities & features: Beach · Boating · Picnic Area · Scenic Overlook · Swimming · Visitor Center

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54 parks mapped in Colorado

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Sources: Wikimedia Commons / editorial, State agency, USGS PAD-US · updated 2026-08-23