Scoggins Valley Park Travel Guide

Scoggins Valley Park is a Washington County park in the Tualatin Valley foothills of northwestern Oregon, roughly 30 miles southwest of Portland. The park's centerpiece is Henry Hagg Lake, a reservoir created by Scoggins Dam on Scoggins Creek, managed jointly for water supply and recreation.

The park attracts day-trippers and campers from the greater Portland metro area seeking boating, fishing, swimming, cycling, and hiking without driving deep into the Cascades. Its relatively low elevation means it becomes accessible earlier in the season than mountain alternatives.

The landscape is a mix of open water, forested hillsides, and grassy shoreline areas. Wildlife sightings — including osprey, great blue herons, and white-tailed deer — are common throughout the year.

Entry and Permits

Scoggins Valley Park is a Washington County facility. A day-use vehicle fee is charged at the entrance; verify the current fee and any annual pass options directly with Washington County Facilities Management or at the park gate before your visit, as these change periodically.

Swimming is permitted only in a designated swim area when it is open. Water conditions, including harmful algal blooms, can close the swim area without much advance notice — check Washington County's official communications before a summer visit.

What to Bring

• Sunscreen and a hat; shade is limited at the lake's edge
• Drinking water, especially for hiking loops away from facilities
• A valid Oregon or reciprocal-state fishing license if you plan to fish (verify requirements with Oregon Department of Fish and Wildlife)
• Life jackets for anyone on the water — required by law for certain vessel types and ages
• Insect repellent in spring and early summer

The park is located off Scoggins Valley Road near the community of Gaston in Washington County. From Portland, the most common route is west on US-26 (Sunset Highway) toward Hillsboro, then south and west on surface roads through Forest Grove toward Gaston — verify the exact current routing with a navigation app, as road numbering in the area can be confusing.

There is no direct scheduled public transit service to the park. Visitors without a car typically arrange a rideshare to Forest Grove and then a private vehicle for the final miles, or join a guided group outing. Cycling to the park from Forest Grove is possible but involves rural roads with limited shoulders — experienced cyclists sometimes use this approach.

Parking is available inside the park at multiple day-use lots; lots can fill early on summer weekends and holiday Mondays. Arriving before 9 a.m. is advisable on peak days.

A paved loop road encircles Henry Hagg Lake and is used by cyclists, joggers, and drivers moving between the park's different recreation areas. The loop is approximately 15 miles in length and is a popular cycling route, though it shares the road with vehicle traffic.

Hiking trails branch off from the main loop into the forested hillsides. Trail conditions vary by season; the lakeside areas can be muddy in winter and early spring. Signage is generally adequate but carrying a downloaded map or screenshot is helpful.

Boaters can launch from one of two boat ramps in the park. Motorized boats are permitted on Henry Hagg Lake, though speed and horsepower restrictions may apply — verify current rules with Washington County before trailering a boat.

Scoggins Valley Park operates a campground with a mix of tent and RV sites. Hookup availability and reservation requirements vary by site type — book through Washington County's reservation system well in advance for summer weekends, as the campground fills quickly.

Visitors preferring indoor lodging will need to look to nearby towns. Forest Grove (roughly 10 miles away) has chain hotels and small inns. Hillsboro and Beaverton, further east toward Portland, offer a broader range of accommodation. Verify availability and current options through standard booking platforms.

Some visitors combine a Scoggins Valley day trip with stays in Portland's west side, making the park an easy day excursion from the city.

On the Water

Henry Hagg Lake supports fishing for bass, catfish, trout, and panfish. The lake is stocked periodically by Oregon Department of Fish and Wildlife. Kayaking, canoeing, paddleboarding, and motorboating are all practiced here. Boat rentals may be available at the park during the main season — verify locally as concession arrangements change.

The designated swim beach provides the only sanctioned swimming area. It is typically open during summer months, but check current status before visiting, as algal bloom closures occur.

On Land

• Hiking: The trail system includes routes ranging from easy lakeside walks to moderately hilly forest paths. The full perimeter trail is a solid half-day outing.
• Cycling: The paved loop road is a Washington County cycling destination in its own right, popular with road cyclists from the greater Portland area.
• Picnicking: Multiple day-use picnic areas are scattered around the lake, some with covered shelters that can be reserved in advance through Washington County.
• Wildlife Watching: Osprey nesting platforms are visible from the shoreline; birding is productive year-round.

There are no restaurants or food concessions within the park itself; bring everything you need. Picnic facilities are well-suited to packed meals, and campground cooking is a key part of the overnight experience for many visitors.

Forest Grove is the nearest town with grocery stores, bakeries, coffee shops, and casual restaurants. Stock up there before heading to the park. Gaston, closer to the park entrance, is a very small community with limited services — do not rely on finding supplies there.

Alcohol policies in the park are subject to Washington County rules; verify current regulations before bringing beverages.

Facilities

Restrooms and portable toilets are located at day-use areas and the campground. Running water availability varies by area — verify locally. A dump station for RVs is present in the campground area (verify current status).

Connectivity

Cell service can be spotty around parts of the lake, particularly on the west and south sides. Download maps, park information, and emergency contacts before arriving.

Seasonal Closures

The park and some facilities may have reduced hours or restricted access in winter months. The boat launch and swim area follow seasonal schedules. Check Washington County's official parks page for current hours and any closures before your visit.

Emergency Services

In an emergency, call 911. The park is in Washington County jurisdiction. The nearest hospital facilities are in Forest Grove or Hillsboro. Cell coverage gaps mean it is wise to note the park's entrance road name and your specific location in case you need to relay that information.

Water safety is the primary concern at Scoggins Valley Park. Henry Hagg Lake can develop harmful algal blooms (cyanobacteria) in warm summer months; these can be toxic to humans and pets. Always check current water quality advisories before swimming or allowing pets near the water.

Life jacket use is strongly recommended for all boaters and is legally required for children under a certain age on Oregon waters — confirm current Oregon State Marine Board rules before your trip.

The paved loop road has no dedicated bike lane, so cyclists and drivers share the surface. Use lights, wear visible clothing, and ride predictably. Trails can have uneven footing, exposed roots, and slippery conditions after rain.

Wildlife encounters are generally benign, but store food securely at camp to avoid attracting wildlife. Ticks are present in the area; check yourself and pets after time in brush or tall grass.