DateExpected
Mid October 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Kurpark – An der Bürgerallee, 02797 Oybin
Hain, Görlitz
Countdown
October
The big one at O-SEE: 100 km round a single loop, with about 3,450 m of climbing. A proper ultra, and you need to have earned your place on the start line.
Key facts
01Qualifying trail race of 70 km or more within the last five years is required
02Minimum age 18
03Team entries are ranked as well as solo
Create a free training plan for the O-SEE 75k 100 km
7-day free trial, no card required
The course
The route
Hain
Distance100km
Total climb3,451m
StartElevation
0 kmDrag map to rotate90.7 km
Weather
Mid-October, Hain
13°CTypical high
5°CTypical low
-4°CColdest in 20 years
36%Days with rain
Highs around 13°C and lows around 5°C, but it has dropped to -4°C. Rain on 36% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
Training
Training for the O-SEE 75k 100 km
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 O-SEE 75k 100 km plan targets
Typical sessions
100 km with 3,451 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
Hill reps and vert to prepare the climbs and descents
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 O-SEE 75k 100 km plan.
7-day free trial, no card required.
Other races at O-SEE 75k
More events in October in Germany
Oberaudorf Trail FestivalExpected Early October 2027 · Oberaudorf→Black Forest Trailrun MastersExpected Early October 2027 · Elzach→BurgentrailExpected Early October 2027 · Ostheim vor der Rhön→Neudorfer FichtelberglaufSat, 2 Oct 2027 · Oberwiesenthal→Prenzlauer HügelmarathonSat, 2 Oct 2027 · Prenzlau→Taubertal 100Expected Early October 2027 · Rothenburg ob der Tauber→
