Willapa Hills

Willapa Hills State Park Trail is a 56-mile multi-use trail traversing the Willapa Hills region of southwestern Washington from South Bend to Chehalis. The trail follows the former Northern Pacific Railroad corridor, converted to recreational use in 1998. The trail passes through second-growth forests, agricultural lands, and small communities, providing a scenic route through rural Washington. Elevation ranges from near sea level at South Bend to approximately 400 feet in the interior hills. The trail serves hikers, mountain bikers, equestrians, and in some sections, motorized users. As one of Washington's longer rail-trails, it offers opportunities for multi-day adventures or short local excursions. The trail showcases the region's transition from coastal to interior forest ecosystems.

The trail corridor provides habitat connectivity across the Willapa Hills landscape. Roosevelt elk are commonly observed, particularly in forested sections. Black-tailed deer browse along the trail edges. Black bears utilize the corridor for movement between habitat patches. The forests support populations of northern spotted owls, marbled murrelets, and band-tailed pigeons. Smaller mammals including Douglas squirrels, chipmunks, and raccoons are abundant. The trail crosses numerous streams supporting salmon and trout populations. Amphibians including Pacific tree frogs and roughskin newts thrive in the moist environment. Red-tailed hawks and bald eagles hunt from perches along open sections. The linear corridor allows wildlife movement while fragmenting forests, creating both benefits and challenges for conservation. Trail users frequently encounter diverse wildlife along the route.

The trail passes through classic western Washington second-growth forests dominated by Douglas-fir, western hemlock, and western red cedar. Red alder colonizes disturbed areas and forms pure stands in wetter locations. Big-leaf maple creates deciduous pockets with spectacular fall color. The understory features salal, Oregon grape, sword fern, and huckleberry. Wetland crossings support skunk cabbage, devil's club, and various sedges. Open areas contain blackberry thickets, both native trailing blackberry and invasive Himalayan blackberry. Wildflowers along the trail include trillium, bleeding heart, and tiger lily. The vegetation reflects the maritime-influenced climate with abundant rainfall. Forest age varies from recent clearcuts adjacent to the trail to 80-100 year old second growth. Invasive species management targets Scotch broom and English ivy.

The Willapa Hills consist of uplifted marine sedimentary rocks of Tertiary age, including sandstone, siltstone, and shale. The bedrock was deposited in a shallow sea and subsequently uplifted by tectonic forces. The railroad grade follows stream valleys and traverses ridges using gentle grades suitable for rail operation. Numerous stream crossings feature trestle bridges, some spanning impressive canyons. Glaciation did not reach this far south, so the landscape reflects stream erosion rather than glacial sculpting. Landslides are common on steep slopes, occasionally impacting trail maintenance. Soil is typically clay-rich and prone to saturation during wet months. The geology influences vegetation patterns, with sandstone areas supporting different plant communities than clay-rich zones. Evidence of past logging activity is visible throughout the corridor.

The trail experiences a maritime climate transitioning to more continental influences inland. Annual precipitation ranges from 80-100 inches along the western sections to 50-60 inches in the eastern portions. Winter temperatures average 35-45°F while summer temperatures range from 65-75°F. Most precipitation falls between October and April, with summers relatively dry. The trail can be very wet and muddy during winter months, making some sections challenging for trail users. Snow is occasional but generally doesn't persist at these low elevations. Fog is common during spring and fall, particularly in valleys. The mild climate allows year-round trail use, though winter conditions can be uncomfortable. Spring offers the best combination of moderate temperatures and drier trail conditions.

The Willapa Hills region has been home to indigenous peoples including the Chehalis and Chinook tribes for thousands of years. The area provided rich resources from forests, rivers, and nearby coastal areas. European-American settlement accelerated in the late 1800s with timber harvesting becoming the dominant industry. The Northern Pacific Railroad completed the rail line through the Willapa Hills in the 1890s to transport timber and agricultural products. Logging camps and mill towns developed along the route. The railroad operated through most of the 20th century before rail service was abandoned in the 1990s. Communities along the route declined as timber industry employment decreased. Rails-to-trails conversion began in 1998, repurposing the corridor for recreation and providing economic development opportunities through trail-based tourism.

Willapa Hills State Park Trail was established in 1998 following acquisition of the Northern Pacific Railroad corridor by Washington State Parks. Initial development focused on removing rails, stabilizing trestle bridges, and creating basic access points. The trail opened in phases as different sections were completed and made safe for public use. Trestle restoration proved challenging and expensive, with some structures requiring major engineering work. Conflicts arose between different user groups regarding motorized access, leading to designation of specific sections for different uses. Trail surface improvements converted the railroad ballast into a more user-friendly surface. Trailheads were developed at road crossings and former railroad stations. The trail has become increasingly popular as awareness has grown. Ongoing maintenance addresses drainage, vegetation encroachment, and bridge preservation.

The entire 56-mile trail offers continuous recreation opportunities with numerous access points. Major trestle crossings provide dramatic views and engineering marvels, including several exceeding 100 feet in length. The trail passes through the communities of Raymond, Pe Ell, and Adna, allowing for supply stops and cultural experiences. Forested sections offer peaceful hiking through second-growth timber. Open sections provide views of agricultural lands and the Willapa Hills landscape. Stream crossings showcase the region's abundant water resources. Historic railroad features including mile markers, signal equipment, and station sites provide historical interest. The western terminus at South Bend connects to the Willapa Bay shoreline. The eastern terminus near Chehalis links to other regional trails. Seasonal highlights include spring wildflowers and fall foliage.

The trail features multiple trailheads with parking, vault toilets, and information kiosks. No camping facilities exist along the trail, though nearby communities offer lodging and camping options. Water is not available on the trail; users must carry adequate supplies. The trail surface varies from hard-packed gravel to rougher ballast in some sections. Most sections are suitable for hiking and mountain biking, while some allow equestrian and motorized use. Trail difficulty varies with terrain, though the railroad grade maintains relatively gentle slopes. The trail is accessible from numerous road crossings along State Route 6 and other local roads. No fees are required for trail access. The trail is open year-round, though winter conditions can make sections muddy and challenging. Cell service is limited along much of the route.

Trail management balances recreation with habitat corridor preservation. The linear corridor provides wildlife movement opportunities across a fragmented landscape. Riparian areas along stream crossings receive special protection to maintain salmon habitat. Invasive species control prevents spread of non-native plants along the trail corridor. Bridge and trestle maintenance preserves historic structures while ensuring public safety. Drainage management prevents erosion and protects water quality in crossed streams. The trail demonstrates successful adaptive reuse of transportation infrastructure for recreation and conservation. Partnerships with local communities support trail maintenance and promotion. Monitoring programs track trail condition, user numbers, and wildlife use of the corridor. Climate change considerations include assessment of flood risks and increased storm intensity impacts on infrastructure.