Starting at 63°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. Light winds shouldn't be a major factor for pacing.

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Distance: 3.1mi

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About the Beat the Blerch 5K

The Beat the Blerch 5K is an out-and-back run on the flat gravel Snoqualmie Valley Trail, starting and finishing at Tolt-MacDonald Park in Carnation, Washington. It is the shortest distance of the weekend and the easiest way to take in the evergreen, mossy forest along the trail. Costumes are encouraged, and Blerch characters and cake are part of the day at every distance.

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Race weekend

Saturday, September 12

8:00 AMMarathon (26.2 mi)

9:00 AMHalf Marathon (13.1 mi)9:30 AM10K (6.2 mi)

12:00 PM5K (3.1 mi)

Beat the Blerch 5K FAQ

When is the 2026 Beat the Blerch 5K?

The 2026 Beat the Blerch 5K will be held on Saturday September 12, 2026.

What is the time limit for the Beat the Blerch 5K?

The time limit for the Beat the Blerch 5K is 3 hours.

What will the weather be like for the 2026 Beat the Blerch 5K?

The forecast calls for a high of 66°F and a low of 54°F with a 0% chance of rain. Check our detailed hourly forecast above for the best 5K race plan.

What is the weather usually like for the Beat the Blerch 5K?

Over the 10 years racecast.io has race-day weather for (2014 to 2026), it averaged 68°F at the start and 70°F by a typical finish. Rain fell during race hours in 1 of those years (2025).

What was the hottest Beat the Blerch 5K?

Of the 10 years on record, 2022 was the warmest, reaching 84°F during race hours. The coldest start was 2018, at 62°F.

What was the windiest Beat the Blerch 5K?

Of the 10 years on record, 2016 was the windiest, with wind averaging 16 mph during race hours. The calmest was 2024, at 5 mph.

Beat the Blerch 5K weather history

Based on 10 years of data

Avg Temp

69°F

L:68° H:70°

RunScore

Conditions

Rain Freq

10%

1 of 10 yrs

Wind8mph

Dew54°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Beat the Blerch 5K Partly cloudy throughout the day. 2026	63°/65°	-	52°
2025 Beat the Blerch 5K Partly cloudy throughout the day with afternoon rain. 2025	65°/65°	Light	60°
2024 Beat the Blerch 5K Clear conditions throughout the day. 2024	74°/75°	-	60°
2023 Beat the Blerch 5K Clear conditions throughout the day. 2023	69°/72°	-	53°
2022 Beat the Blerch 5K Clear conditions throughout the day. 2022	79°/84°	-	47°
2018 Beat the Blerch 5K Partly cloudy throughout the day with late afternoon rain. 2018	62°/62°	-	49°
2017 Beat the Blerch 5K Partly cloudy throughout the day. 2017	64°/67°	-	49°
2016 Beat the Blerch 5K Cloudy skies throughout the day with rain. 2016	63°/64°	-	58°
2015 Beat the Blerch 5K Clear conditions throughout the day. 2015	73°/75°	-	57°
2014 Beat the Blerch 5K Clearing in the afternoon. 2014	67°/70°	-	57°