Much of this trail is not constructed yet, but when complete this important piece of the 40 Mile Loop trail system will provide an over 21 mile east-west link along the Columbia Slough -- connecting Blue Lake Regional Park in Gresham to Kelly Point Park in North Portland. The built segments of the trail pass by Delta Park between North Portland Road and Interstate 5 on the west end and also along the slough adjacent Airport Way on the east end.
The Columbia Slough is approximately 19 miles long and stretches from its origin at Fairview Lake westward to its confluence with the Willamette River. In spite of its urbanized character, the Columbia Slough contains surprising biodiversity. Mammals such as deer, beaver, and river otter are common along the slough, and about 175 bird species have been documented in the watershed (including a number of neotropical migratory birds). Western painted turtles (one of only two turtle species in Oregon) and several salmonid species inhabit portions of the slough. The slough provides a valuable wildlife corridor that runs from the Sandy River Delta to the Willamette River. Acquisition opportunities include remnant vegetated patches along the slough channels, wetlands, and adding to the few large upland protected sites. Many potential acquisition sites will need extensive restoration.
Check out the 40 Mile Loop map to see how this now over 150 mile trail system has evolved.