This reference to the 'Milton Interurban Trail' intrigues me: .
Apparently it's only 2-3 miles long, and part of a planned expansion of the current South Interurban Trail from its current terminus in Pacific. The trail in Milton follows Hybelos Creek, just east of I-5 near where it bends in Fife. I've got to check it out sometime to see if it's a good way out of the Tacoma mudflats.
Also, <a href="http://www.co.pierce.wa.us/PC/abtus/ourorg/pwu/tpp/nonmotor/bicycle.htm">the new online Pierce County bike map is pretty cool.</a>