Contact Us

Ultra Information: 50-Mile and 50K

Detailed Ultra information is contained in the Ultra Information Packet

Start/finish location: Snoqualmie Elementary School, 39801 S.E. Park St., Snoqualmie, WA

Directions to the start

Ultra Categories and Start Times

Under 40
40 +
Men's 50K 8:30 8:30
Women's 50K 8:30 8:30
Men's 50-Mile 6:00 6:00
Women's 50-Mile 6:00 6:00

Course closes at 5:00 p.m.
Note: 5:00 a.m. early start for 50-milers OK by request

Course Descriptions

Printable overview Course Map with aid stations (PDF)

The name Mt. Si Ultra is a little misleading: You run at the base of Mt. Si not up it! The 50K course is 95% trail with about 1,000 feet of elevation gain and loss. The 50K merges at the 19.4 mile location of the 50-mile course. The 50-mile run is 88% on trail with 1,400 feet of elevation gain and loss.

The courses run on the Snoqualmie Valley and Iron Horse Trails, providing views of the Cascade foothills and the Snoqualmie and Tolt Rivers.

The 50-mile course follows city roads and the trail from the town of Snoqualmie northwest to Fall City and to the South edge of Carnation, where runners turn around and run southeast to North Bend.

At the 19.4 mile mark, in the town of Snoqualmie, the 50-milers will be joined by the 50K runners and head to Rattlesnake Lake via the Snoqualmie Valley Trail and then to Twin Falls Trailhead via the John Wayne Trail in Iron Horse State Park. Here they will make a U-turn at an aid station and head back to the finish at Snoqualmie Elementary School.

The trail is old railroad grade. It offers a gentle elevation and is generally wide with some crushed rock, but usually is packed dirt and grass. The steepest climb is from North Bend to Rattlesnake Lake, which is 450 feet over five miles.

50K Course Map (web)50-Mile Course Map (web) • Note: last 30.7 miles of 50-mile course same as 50K course.

Aid Stations

For 50-milers there are six full aid stations and three mini food/water stations. For 50K participants, there are three full aid stations and two mini food/water stations.

Finish line

Refreshments will be available at the finish area. Medical aid will also be available. A limited number of shirts from this year and previous years will be for sale.

Results and awards

Preliminary results will be posted at the finish line. Complete results will be available online soon after the race. Awards will be given to the top finishers in each category/division.

Copyright 2018 Eastside Runners. All rights reserved.