Great hiking.
From I-90 east, take Exit 18, East Sunset Way - Highlands Drive. Stay left on Highlands Drive and follow for 2.1 miles. Turn right onto Issaquah-Fall City Road and follow for 2 miles. At Endeavor Elementary School, the road becomes Duthie Hill Road. Follow it for one mile and turn right into the park. There is a small parking lot next to the maintenance shop.
http://www.tripleblaze.com/trail.php?c=3&i=7642