Contact Information
20606 S.E. 56th St.
Issaquah, WA 98027
425-455-7010
Olallie State Park consists of 539 acres with 21,588 feet of freshwater shoreline on the south fork of the Snoqualmie River. Olallie includes the Garcia Recreation Area, Snoqualmie Pass Wagon Road Heritage Area and Twin Falls Natural Area. A hydroelectric power plant and weir is located at Weeks Falls, with parking, viewpoints to the river and falls, approximately 1/4 mile of interpretive trail and two vault toilets.
Parking areas have also been established at both ends of the Twin Falls Trail. Each parking area has two vault toilets.
Park activities include hiking, fishing, bicycling, picnicking, and rock climbing.
Washington's climate varies with each region. The Cascades split the state and alter weather patterns. Moisture bearing winds coming from the west give generous amounts of precipitation to the western slopes of the mountains, with wintertime snow above about 3000 feet. This area has an average annual precipitation of 87 inches and an average wintertime snow depth of 87 inches.
Average maximum summer temperatures are in the mid to high 60s with a minimum average in the mid 40s. Because of the elevation and distance from the moderating oceans, winter temperatures are much colder than those in in the Seattle area, with minimum temperatures in the 20s and maximum temperatures in the 30s.
