Main Fork Dosewallips River Trail is a 39.2 mile heavily trafficked out and back trail located near Brinnon, WA that features a lake and is only recommended for very experienced adventurers. The trail offers a number of activity options and is accessible from May until October.
Dosewallips campground used to be a nice car camping park. From what I understand the bridge washed out so many times, the road has been turned into a trail. The trail is about 5.4 miles in to the campground.
Beautiful hiking and not a bad place to take a dip if your feeling adventurous.
Bring your mountain bike. I love the fact that vehicle access remains washed out. I sure hope they keep it this way. It's one place a person can mountain bike in the National Park and have very nice campgrounds with tables, fire pits, and bear vaults. Mountain bike are now allowed beyond the ranger station though, but it is a nice 5 mile ride anyway. Great fly fishing here also.
This trail has access to a lot of trail systems in the Olympics and you will use this often.
From the road washout to the Dosewallips ranger station, it is all road walking. From the ranger station you begin trail hiking. It is very nice and well maintained. You will be able to find a lot of info on this trail searching the olympics web sites.