Tunnel Light Marathon
Tunnel Light Marathon race day weather
Cool and rainy, adjust strategy
Runners will face temperatures starting at 42°F and rising slightly to 43°F. With moderate rain expected, the humidity will be at 99%, making conditions feel damp and chilly. Wind will be light at 7 mph from the south, but headwinds will challenge runners from miles 1-6, requiring pacing adjustments. Due to the rain, hydration should be prioritized, and a throwaway layer may be beneficial during pre-race.
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Tunnel Light Marathon route and elevation
The Tunnel Light Marathon course has about 44 ft (13 m) of climbing and 951 ft (290 m) of descent, a net drop of about 907 ft (276 m). It drops more than it climbs, and its terrain is faster than 95% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. It has no steep miles: no mile climbs more than 15 ft (5 m).
What the hills cost
- 3:30 on a flat course is about 3:27 here (3 minutes faster).
- 4:00 on a flat course is about 3:56 here (4 minutes faster).
- 4:30 on a flat course is about 4:26 here (4 minutes faster).
Hills only, priced mile by mile on the course map. The pace calculator above adds the race-day weather.
Even-effort splits for a 3:30, 4:00 or 4:30 finish
| Mile | Climb | Descent | 3:30 | 4:00 | 4:30 |
|---|---|---|---|---|---|
| 1 | 5 ft | 6 ft | 8:07 | 9:17 | 10:27 |
| 2 | 5 ft | 3 ft | 8:09 | 9:19 | 10:28 |
| 3 | 4 ft | 7 ft | 8:08 | 9:17 | 10:27 |
| 4 | 3 ft | 9 ft | 8:06 | 9:16 | 10:25 |
| 5 | 1 ft | 15 ft | 8:05 | 9:14 | 10:23 |
| 6 | 2 ft | 6 ft | 8:07 | 9:16 | 10:27 |
| 7 | 12 ft | 11 ft | 8:08 | 9:18 | 10:27 |
| 8 | 6 ft | 2 ft | 8:10 | 9:20 | 10:30 |
| 9 | 13 ft | 2 ft | 8:13 | 9:24 | 10:35 |
| 10 | 10 ft | 3 ft | 8:12 | 9:22 | 10:32 |
| 11 | 8 ft | 4 ft | 8:10 | 9:20 | 10:30 |
| 12 | 2 ft | 5 ft | 8:07 | 9:16 | 10:26 |
| 13 | 8 ft | 5 ft | 8:09 | 9:20 | 10:29 |
| 14 | 11 ft | 4 ft | 8:12 | 9:22 | 10:32 |
| 15 | 4 ft | 15 ft | 8:05 | 9:14 | 10:24 |
| 16 | 0 ft | 51 ft | 7:56 | 9:04 | 10:12 |
| 17 | 0 ft | 76 ft | 7:50 | 8:58 | 10:05 |
| 18 | 0 ft | 81 ft | 7:50 | 8:56 | 10:03 |
| 19 | 0 ft | 86 ft | 7:48 | 8:56 | 10:03 |
| 20 | 0 ft | 85 ft | 7:49 | 8:55 | 10:02 |
| 21 | 0 ft | 83 ft | 7:49 | 8:56 | 10:03 |
| 22 | 10 ft | 91 ft | 7:49 | 8:57 | 10:04 |
| 23 | 0 ft | 77 ft | 7:51 | 8:57 | 10:04 |
| 24 | 0 ft | 86 ft | 7:48 | 8:56 | 10:03 |
| 25 | 0 ft | 82 ft | 7:50 | 8:56 | 10:03 |
| 26 | 0 ft | 87 ft | 7:48 | 8:55 | 10:02 |
| Last 0.2 | 0 ft | 21 ft | 1:44 | 1:59 | 2:14 |
Explore the Tunnel Light Marathon course with the weather and your pace along the route, or compare it with other races.
About the Tunnel Light Marathon
The Tunnel Light Marathon runs point-to-point from the Hyak Sno-Park Trailhead near Snoqualmie Pass to the Garcia Trailhead in North Bend, Washington, on the historic John Wayne Pioneer Trail rail bed. Runners pass through the roughly 2.3-mile Snoqualmie Tunnel after the halfway point; the tunnel is unlit, so headlamps are required. Storm damage to the original course means the 2026 race follows a permitted detour with about 1,000 feet of net downhill, less than the race's usual net drop of around 2,000 feet. The course is USATF-certified and a Boston Marathon qualifier. It is one of three races the organizer runs on the same corridor each year, alongside the Light at the End of the Tunnel Marathon in June and the Tunnel Vision Marathon in August.
