Trails

Visit NWTA Trail Wiki - beta for trail info shared by other local riders and help add your own content as well!  Your contribution will make this resource succeed.  For recent trail update, follow Trail > Recent Updates link on nw-trail.org main menu.

Here are other resources for locating trails:

Oregon

Ride Oregon Ride - site by Travel Oregon covering many trails throughout the state of Oregon 

 

Portland Parks

Forest Park
Powell Butte Nature Park

Larger Portland Metro Area
Hagg Lake Park - info and map of the loop around Hagg Lake, located southwest of Forest Grove.
City of Camas - Lacamas Park - info and basic trail map of the 4 miles of unpaved trails around Lacamas Lake (WA).

Vernonia Area 
L. L. Stub Stewart State Park - info and park brochure, which includes a basic trail map of the 15+ miles of trails in Oregon's newest State Park.
Banks Vernonia State Trail - info and basic trail map of a very popular 21-mile long multi-use trail that runs from Hwy 26 to the town of Vernonia along an old, abandoned railroad.

Tillamook State Forest
Oregon Dept. of Forestry (ODF) trail maps -  various maps of the 65+ miles of non-motorized trails in the Tillamook State Forest, mostly concentrated in the area north of Highway 6. Trails  include Wilson River, Kings Mountain/Elk Mountain/Elk Creek, Gales Creek, Historic Hiking Trail, and Storey Bur.

SW Washington - Mount St. Helens
Gifford Pinchot National Forest trail maps - various maps of popular mountain bike trails around Mount St. Helens, including Lewis River Trail #31, Craggy Peak Trail #3, and Ape Canyon Trail #234.

SW Washington - Other

Evergreen Mountain Bike Alliance - trail info wiki with lots of shared knowledge about trails in Washington.
Washington Dept. of Natural Resource (WADNR) trail maps - a wide assortment of maps of WA area trails including popular MTB trails in SW Washington such as Buck Creek, Capitol State Forest, Mt. Mitchell/Siouxon Creek, Tarbell/Bells Mountain/Silver Star and Three Corner Rock.
Klickitat Trail Conservancy Maps - map of the 31-mile Klickitat Trail along the Klickitat River (starting in Lyle, WA, North of the Columbia River).
Growlers Gulch maps Sign up on Jim LeMonds' website to gain access to the trail maps for Growlers Gulch near Castle Rock, Washington. 

Mount Hood
Mount Hood National Forest Mountain Biking Areas - the list of the 140 miles of trails open to mountain bikes in Mt. Hood National Forest
Mount Hood Territory Bike Maps - various maps of on-road and off-road trails in the Mt Hood area including Pioneer Bridle, and Timothy Lake.

Sandy Ridge Mountain Bike Area

Sandy Ridge Mountain Bike Area

If there are additional maps not featured here, feel free to edit the public trail wiki at http://nw-trail.org/wiki to add detail about particular trails.  If you want to share a good trail map resource that's available online, then include a link to it from the particular trail page.