Timberline Marathon

Government Camp, OR, USA · June 5, 2027

58°·71° high·Light·Dry

Weather

Race Day Weather

58°at start

72° high

Breezy

Dry

Comfortable temps, warming through the race

Mild 58°F temps at gun time mean comfortable early miles without overheating risk. Temperatures rising to 72°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 247 days

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

4 PM

5 PM

Pre-raceRace windowPost-race

Pace Calculator

Distance: 26.2mi

Target Finish Time

0:00:00

HH:MM:SS

Pace

—

Weather Adj.

—

Common Goals:

Get forecast alerts for Timberline 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 Timberline Marathon circles Timothy Lake twice on the shoulders of Mount Hood, a singletrack trail course at roughly 3,000 feet in Oregon's Cascades. The route crosses the Timothy Lake dam and several rustic bridges before finishing near the historic Clackamas Lake Ranger Station. It runs every June alongside a 14.4 mile half marathon offered on both Saturday and Sunday. Negative Split organizes the race under a special-use permit with the Mt. Hood National Forest.

Website

Course Map

FAQ

When is the 2027 Timberline Marathon?

The 2027 Timberline Marathon will be held on Saturday June 5, 2027.

What will the weather be like for the 2027 Timberline Marathon?

The forecast calls for a high of 75°F and a low of 48°F with a 6% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 5 years of data

Avg Temp

71°F

L:65° H:76°

RunScore

Conditions

Rain Freq

20%

1 of 5 yrs

Wind8mph

Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Timberline Marathon Clear conditions throughout the day. 2025	69°/88°	-	55°
2024 Timberline Marathon Clear conditions throughout the day. 2024	69°/83°	-	51°
2023 Timberline Marathon Partly cloudy throughout the day. 2023	62°/73°	-	49°
2022 Timberline Marathon Partly cloudy throughout the day with rain. 2022	65°/69°	-	57°
2021 Timberline Marathon Partly cloudy throughout the day with afternoon rain. 2021	61°/68°	Light	47°

More OR Races

Lithia Loop Trail Marathon

2026-11-07 · Ashland, OR, USA

Vernonia Marathon

2027-04-11 · Banks, OR, USA

Newport Marathon - Oregon

2027-06-05 · 42.200km · Newport, OR, USA

Foot Traffic Flat Marathon

2027-07-04 · 42.200km · Portland, OR, USA

Pacific Northwest Marathon

2026-09-19 · 42.200km · Harrisburg, OR, USA

Portland Marathon

2026-10-04 · 42.200km · Portland, OR, USA

Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide