Date
Sun, 6 Jun 2027
Start
08:30
Venue
Clackamas Lake Historic Ranger Station, Government Camp, Oregon
Government Camp, Clackamas County
Countdown
June
The Sunday half for people who want longer on the trail. Same gentle loop, but you start earlier so a slower pace still gets you home in time.
Key facts
01Meant for half-marathoners expecting to need more than 4.5 hours
025.5-hour cut-off
03Open to ages 15 to 99
Create a free training plan for the Timberline Marathon: Early Start - Half Marathon - Sunday
7-day free trial, no card required
The course
The route
Government Camp
Distance23km
Total climb250m
StartElevation
0 kmDrag map to rotate22.5 km
Weather
Early-June, Government Camp
18°CTypical high
8°CTypical low
2°CColdest in 20 years
39%Days with rain
Highs around 18°C and lows around 8°C, but it has dropped to 2°C. Rain on 39% of days.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
Training
Training for the Timberline Marathon: Early Start - Half Marathon - Sunday
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Timberline Marathon: Early Start - Half Marathon - Sunday plan targets
Typical sessions
23 km with 250 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Timberline Marathon: Early Start - Half Marathon - Sunday plan.
7-day free trial, no card required.
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