Cross the lower West Seattle bridge. At the west end is the junction with the Alkai bikeway which takes off to the right.
Instead, turn left onto Marginal Place SW which takes you down to West Marginal Way in a short block
Go south on West Marginal Way (may have some traffic). After a couple of long blocks (at the Grayline bus lot) find the Duwamish Trail on the left and
Continue south on the trail first on the east and then on the west of the railroad tracks
Trail turns left at SW Michigan and goes under approaches to First Ave. S.bridge
Trail turns right beside Highway 99 and ends at S. Holden
Turn left on S. Holden (watch out for traffic exiting Highway 99)
At the first stop sign turn right on 5th Ave. S.
At the next stop sign turn left on S. Monroe
At the first stop sign turn right on 8th Ave. S.
Cross S. Cloverdale at the light
Where 8th Ave. S bears left to a dead-end look for the entrance to the bike trail next to Highway 599
(this trail fragment may be overgrown to the point of being scary and badly warped by roots.- see alternate below)
Where this fragment of the trail ends turn left onto S. Henderson and pedal up a short steep hill
At the bottom of the other side of the hill turn right onto
4th Ave. S (may have some traffic).
(You can also get to 4th Ave. South by turning left (east) at the 8th Ave. S / Cloverdale intersection.)
A block south of Henderson get into the left turn lane and continue south on
West Marginal Place S (a frontage road separated from Highway 599 by a chain-link fence with little traffic)
Watch out for traffic exiting from 599 at the beginning and end of this segment
At S 102nd (the next interchange on Highway 599) look for the entrance to the bike trail on the right.
Follow the trail as it crosses the Duwamish and hugs the east bank between the river and a Boeing building.
The trail crosses the Duwamish again on the East Marginal Way S bridge, and wraps around under that bridge before continuing south on the river bank and through parking lots
Watch out for chickens in Allentown. After returning to the riverbank the trail goes under the Allentown bridge and through more parking lots
After crossing under I-5 the trail follows the sidewalk on the east side of Interurban avenue next to the Foster golf course before returning to the riverbank
The trail crosses the river again at the junction with the Black River and enters Fort Dent park.
Leaving the park, cross the bridge, turn right, and look for the start of the Interurban trail on the left.
(this is the junction with the Green River trail which takes off to the right under Inturban Ave.)
Follow the Interurban trail to the left over a bike bridge, around the Tukwilla funplex and under I-405
