WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.
To hike From Seattle, take I-90 West. Then take exit 32 (436th Avenue SE). Turn left (north) over the freeway and drive 0.5 miles to SE North Bend Way. Turn left (west), and in 0.25 mile turn right (north) on SE Mt Si Road. In approximately 3.5 miles (past the Little Si and Mt Si trailheads), you will reach a small parking area on the left (directly across from 480th Ave). This is known as the school bus turnaround, and, if you are parking here on school days, park close to the gate.