This trail is in awesome shape. Fast smooth singletrack with the occasional shallow creek crossing. It gets a little hairy with some sharp, short climbs and descents later in to the ride, but for the most past is rolling and fast. Follows the Lewis river for it's entire length. Beautiful scenery. A classic all-singletrack WA rollercoaster.
How to get there:
Get off I-5 at the Woodland/Cougar exit and take 503 towards Mt. St. Helens. Pick up a map at the tourist information (follow the signs, west side of I-5). Go through Cougar and head in to the park. The road changes names from 503 to park road 90. Continue on past the Pine Creek Ranger station to the trail head (Lewis River Trail, No. 31). Monument passes are required to park at the trailheads. They can be purchased at several spots on you way there.