Cascade Express Marathon

North Bend, WA, USA · September 12, 2026
partly-cloudy-day53°·66° high·Calm·Dry
8
Register

Race Day Weather

partly-cloudy-day
53°at start
68° high
Calm
Dry

Cool start, warming finish

Runners will face a temperature increase from 52°F at the start to 68°F by the finish, with average humidity at 75%. Light headwinds in the first five miles could challenge pacing, while a tailwind from miles 6-10 will aid runners. It is advisable to start conservatively and hydrate frequently, especially as temperatures rise, particularly during the descent from mile 15 to 26.

partly-cloudy-night9
partly-cloudy-night9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8

Pace Calculator

Distance: 26.2mi
0:00:00
HH:MM:SS
Pace
Weather Adj.
Common Goals:

Get forecast alerts for Cascade Express Marathon

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Info

The Cascade Express Marathon and Half Marathon run point-to-point on the Palouse to Cascades Trail, starting at Hyak Trailhead near Snoqualmie Pass and descending through the Cascade Mountains past Keechelus Lake to North Bend. The half marathon enters the historic 2.4-mile Snoqualmie Tunnel about half a mile after the start. The marathon's net elevation loss is kept under 1,500 feet so no Boston Marathon downhill time penalty applies. Both distances are USATF-certified and organized by Run Super Series. Source

FAQ

When is the 2026 Cascade Express Marathon?

The 2026 Cascade Express Marathon will be held on Saturday September 12, 2026.

Is the Cascade Express Marathon a Boston Marathon Qualifier?

Yes, the Cascade Express Marathon is an official Boston Marathon qualifier.

What is the time limit for the Cascade Express Marathon?

The time limit for the Cascade Express Marathon is 6 hours.

What will the weather be like for the 2026 Cascade Express Marathon?

The forecast calls for a high of 69°F and a low of 51°F with a 12% chance of rain.

Historical Weather

Based on 5 years of data
Avg Temp
72°F
L:58° H:72°
RunScore
8
Conditions
Rain Freq
20%
1 of 5 yrs
Wind8mph
Dew54°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
cloudy
60°/65°Light
9
2024
clear-day
64°/75°-
8
2023
clear-day
55°/72°-
8
2022
clear-day
60°/84°-
8
2021
partly-cloudy-day
53°/62°-
8