Jack and Jills Downhill Marathon (Sunday)
Race Day Weather
Comfortable temps, big temp swing
Mild 54°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 74°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing. Moderate humidity at 67% is worth noting for effort level, especially in later miles.
Pace Calculator
Get forecast alerts for Jack and Jills Downhill Marathon (Sunday)
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized Jack and Jills Downhill Marathon (Sunday) race plan
Weather-adjusted pacing, per-mile terrain splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.
Race Info
The Jack & Jill's Downhill Marathon in North Bend, Washington, offers runners a fast, net-downhill course along the scenic Palouse to Cascades State Park Trail. Starting near the Snoqualmie Tunnel, the 26.2-mile route features a gradual descent of approximately 1,300 feet, ideal for setting personal records or qualifying for the Boston Marathon. Runners traverse a smooth, hard-packed gravel trail, passing through the iconic Snoqualmie Tunnel and enjoying views of the Cascade Mountains and lush forests. The race is capped at 1,100 participants, with a 6:00 a.m. start and a 6.5-hour time limit, ensuring a well-supported and memorable experience.
