Foster Reservoir

Located between the western slope of the Cascade Range and the folding hills of the Willamette Valley near Sweet Home, Foster Reservoir is one of the 13 reservoirs of the Willamette Valley that was built by the U.S. Corps of Army Engineers between 1961 and 1968.  Construction of Foster Dam was done on the South Fork of the Santiam River consecutively with Green Peter Dam on the Middle Fork of  the Santiam River. Foster Reservoir confines water from the Middle Fork through Green Peter Reservoir and South Fork.

Both reservoirs and dams are operated together for hydroelectric power generation, water retention, flood damage prevention, and irrigation. Foster Dam is a rock-fill construction of 126 feet high and 4,565 feet wide, with a storage size of 61,000 acre-feet. When full, Foster Reservoir covers about 494 ha (1,220 acres) and Green Peter – 1,505 ha (3,720 acres). The length of Green Peter and Foster Lakes are 1,500 ft (457 m) and 4,565 ft (1,391 m) accordingly. The reservoirs provide habitat for rare species such as the northern spotted owl, western pond turtle, steelhead, cutthroat trout, and Chinook salmon.

The proximity of Foster Reservoir to Interstate 5 makes this destination a popular recreation site drawing high traffic in the summer months. A wide range of water  activities such as boating, paddling, water-skiing, swimming, and  fishing are available. The reservoir is well known for a rainbow trout, which is stocked by South Santiam Fish Hatchery annually. The lake is a great site for camping and picnicking.

The Quartzville Recreation Corridor and Back Country Byway starts from the Foster Reservoir and runs approximately 50 miles northeast along Green Peter Reservoir and the Quartzville National Wild and Scenic River, connecting U.S. Highway 20 Oregon Highway 22.

Foster & Green Lakes Recreation Areas

Foster Lake Map

1 - Andrew Wiley Park - a day-use park.
2 - Edgewater County Park & Marina - full hookup RV sites and boat slips.
3 - Foster Lake RV Resort - full and partial RV sites, cabins, studio, tent sites, and boat and RV storage.
4 - Country Star RV Park - a clubhouse, camping cabins, and condos.
5 - Shea Point - a day-use area.

6 - Calkins Ramp - a boat ramp.
7 - Gedney Creek Park - a boat ramp.
8 - Lewis Creek Park - a day-use park.
9 - Sunnyside Park - a campground and day-use area.
10 - River Bend Park - a campground and day-use area.
11 - Thistle Creek Boat Ramp - a boat ramp.
12 - Whitcomb Creek Park - campsites and boat ramp.

Andrew Wiley Creek Park (Sweet Home City Park)

Located at the base of Foster Dam on the bank of the South Santiam River, Andrew Wiley Creek is a day-use park. The ten acres park provides great opportunities for water enthusiasts, anglers, hikers, and nature lovers. There are picnic areas with picnic tables and barbecues, riverside trails, and a boat ramp.

Access allowed: Year-round
Day- use fees: None
1936 54th Ave, Sweet Home, OR 97386
Phone: 800-810-1000

Edgewater County Park & Marina (Linn County Park)

Edgewater County Park & Marina is located on the Southwest shore of Foster Reservoir on Highway 20. The park is a full-service facility with water, electricity, sewer, satellite TV connections, WiFi, and a store. Open year round. The park offers a few tent camping, 49 full hookup RV campsites, and 40 boat slips.

Access allowed: Year-round
Day- use fees: None
Address: 1400 60th Ave Sweet Home, OR 97386
Phone: 541-967-3917

Foster Lake RV Resort

Located on the south shore of Foster Lake on Highway 20, Foster Lake RV Resort offers full and partial RV sites, cabins, studio, tent sites, a fitness room, heated pool, a play area for the kids, cable TV, WiFi, boat and RV storage.

Access allowed: Year-round
Address: 6191 US-20, Foster, OR 97345
Phone: 541-367-5629

Country Star RV Park

Located on Highway 20 across the road from Foster Lake, Country Star RV Park offers 25 full hooks up RV sites, a laundry room.

Access allowed: Year-round
Address: 6281 Hwy 20, Sweet Home, OR 97386
Phone: 541-401-3293

Shea Point

Located off Highway 20, Shea Point is a recreational day-use area with a viewpoint, interpretive displays, and a paved riverside trail.

Phone: 541-818-0431

Shea Point - Foster Reservoir

Shea Point - Foster Reservoir

Calkins Boat Ramp (Linn County Park)

Calkins Boat Ramp is located on the southeast corner of Foster Lake.

Access allowed: Mid-May through Mid-September
Day- use fees: None
Address: 44529 Quartzville Rd, Foster, OR 97345
Phone: 541-967-3917

Gedney Creek Boat Park (Linn County Park)

Located on the north shore of Foster Lake and about 1 mile east of Foster Dam, Gedney Creek Boat Park offers a boat ramp.

Access allowed: May - September
Day- use fees: None
Address: 43795 North River DR., Foster, OR 97345
Phone: 541-967-3917

Lewis Creek Park (Linn County Park)

Foster Lake – Lewis Creek Park
Located on the north shore of Foster Reservoir, 40-acre Lewis Creek County Park is a day-use area that offers a variety of recreational opportunities including boating, water-skiing, swimming, picnicking. A roped-off swim beach, picnic areas with tables and barbecues, moorage, playgrounds, paved trails make this spot a popular summer destination.


Sunnyside Park (Linn County Park)

Sunnyside County ParkSunnyside County Park on the northeast shore of Foster Lake is a campground and a day-use area. The 98-acre park provides a full range of water sports opportunities including fishing, swimming, boating, waterskiing, and jet skiing. The facility offers 130 hooks-up campsites, 35 non-hookup sites, playgrounds, volleyball courts, reservable picnic shelters and group picnic ring, boat moorage and ramp, hiking trails, and a fish cleaning station.


River Bend Park (Linn County Park)

Nestled on the bank of the upper South Santiam River, next to Highway 20, 90-acre River Bend County Park is a campground and day-use area. The campground has 74 basic hook-ups sites with water and electricity, 10 non-hookups sites, and 5 cabins. The park offers a variety recreational opportunities such as camping, hiking, swimming, and picnicking.

River Bend Park
River Bend Park - South Santiam River

Access allowed: Year-round
Day- use fees: None
Address: 45931 Santiam Highway, Foster, OR 97345
Phone: 541-967-3917

Thistle Creek Boat Ramp (Linn County Park)

Nestled on the north shore of Green Peter Reservoir, 9.2 acre Thistle Creek Boat Ramp is a day-use area.

Access allowed: Year-round
Day- use fees: None
Address: Green Peter Reservoir
Phone: 541-967-3917

Whitcomb Creek Park (Linn County Park)

Whitcomb Creek County Park is located on the north shore of Green Peter Reservoir. The 328-acre park offers camping, boating, hiking, fishing, swimming, water-skiing, hiking, and picnicking. The facility has a group camping area, 39 non-hookup campsites, and a boat ramp.

Whitcomb Creek Park - Green Peter Reservoir
Whitcomb Creek Park - Green Peter Reservoir

Access allowed: May-September
Day- use fees: None
Address: Green Peter Reservoir, Cascadia, OR
Phone: 541-967-3917

Foster Reservoir | General Description

Open: Year-round
Managed: Linn County & Sweet Home
Location: Foster and Green Peter Lakes Recreation Areas

Services: RV and tent campgrounds, picnic areas, playgrounds, drinking water, boat ramps and moorage, restrooms
Activities: Camping, hiking, bicycling, fishing, swimming, boating, and picnicking
Accommodations: Campgrounds, RV sites, and cabins

Distance from the parking: Short
Road access: Any passenger vehicle
Day-use fees: Yes in some places
Popularity: High

Elevation: 641 feet (195 m)

Foster Reservoir is located:

  • 6 miles east of Sweet Home
  • 50 miles northeast of Eugene
  • 57 miles southeast of Salem
  • 103miles southeast of Portland.

Body of water: Reservoir
Surface area: 1,220 acres
Shoreline: 11 miles (17.7 km)
Maximum depth: 110 ft (33.5 m)
Transparency: 20.3 ft (6.2 m)

Adventures Nearby

1 Comment

  1. Is there a day-use fee or ramp fee at any of the locations (Edgewater, Caulkins, and Gedney Creek), and if so, ho much is the fee? Do any of them have a yearly fee? I have a kayak and would like to fish the reservoir.


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.