Driving directions to Des Moines Creek Park, SeaTac, WA

From Seattle, follow I-5 South
Take exit 151 (S. 200th St. / Military Rd.)
Continue West onto S. 200th St. (very soft left) at the end of the exit ramp
Go a bit more than 1 mile on S. 200th St., across International Blvd. (Hwy 99)
After going down a big hill, turn left at 18th Ave S., at the far side of the golf course
Follow the road for about 1/3 of a mile and park in the meadow on the left

From Bellevue, follow I-405 South to the junction with I-5, take I-5 South, and follow the directions above.

Transit:
Des Moines Creek Park is served from Downtown Seattle by Metro Transit Routes 132 and 174, combined with a walk of 1 mile or a little less. Those interested in exploring transit options can check Metro's Trip Planner.

To search for a map on the web, enter the address:
18th Ave S and S 200th St, SeaTac, WA
That is the entrance, and parking is South of there.