Harvey Gap is centered around a magnificent, turquoise alpine lake called Grass Valley Reservoir. It’s located just around the corner from neighbor state parks, Rifle Falls and Rifle Gap in Rifle, .
The park is open year round for day-use. Pets, unfortunately, are not welcome at Harvey Gap. The water is a cool shade of blue, due to its unique mineral content. The main attractions are water based including fishing and boating.
Activities at Grass Valley Reservoir
Boating: Grass Valley Reservoir is closed to boating November 1 to March 31.
- Motors must be 20 HP or less.
- Each crew member must have life jacket available on boat.
- Boat ramp is on south side of the lake.
Camping: No, day-use only.
Fishing: Small & largemouth bass, catfish, crappie, perch, northern pike and rainbow trout are common. Ice fishing in winter.
Hiking: There is no designated trail system.
Hunting: Allowed 100 yards from any building or Day Use Area and 50 feet from center-line of road. Waterfowl hunting is available on north end of the lake. Dogs are only permitted in that area and only during that time.
Picnicking: There are 30 picnic sites with grills.
Swimming: In the summer, swimming is popular. There is a swim beach at the south entrance of the Park. There is no life guard.
Visitor Center: Located at Rifle Gap State Park; has info, exhibits and a small gift shop.
Winter Recreation: Ice fishing is permitted when ice is thick enough. There are no groomed trails but the park is open to cross country skiing and snowshoeing.
Address: 5775 Highway 325, Rifle, CO
Season: Year round
Pets: Not permitted in park
Fees: Yes, vehicle entry fee per day or annual pass