Germany · Saxony (Zittau Mountains Nature Park)
Distance
100 km
Date
Entry fee
€130
€ / km
€1.30
XTERRA O-SEE Ultra Trail 100km: Germany's Cross-Border Forest Race, Measured
XTERRA O-SEE Ultra Trail 100K is a trail race held on October 17, 2026, starting and finishing in Kurort Oybin in the Zittau Mountains Nature Park, Saxony, Germany — a forested sandstone ridge landscape on the Czech border. The course covers 100.2 km with 3,451 m of gain (34.4 m/km) including 35 km through the Bohemian Lusatian Mountains in Czech Republic.
The 100k distance debuted in 2025 and is the 2026 XTERRA Trail Run European Championship. A 12% distance-weighted average uphill gradient places this race in the top 10–14% of the DTR database for average climbing steepness. The biggest climb (354m, km 75) arrives after 75km already covered, with a 54.9% maximum gradient spike. Entry runs €140–160 depending on timing (€1.40/km current).
Dresden (DRS) or Prague (PRG) are both 107 minutes by road. A qualifying race of ≥75km in the last five years is required. With 84 finishers in its debut, it suits technically confident 100km runners who want a European championship race in a wooded autumn setting.
Elevation and Terrain
Total Meters
3,451m
D+/KM
34.4m/km
For context, the Tor des Géants 330 loop has 73 D+/km.
Avg Uphill Gradient
12.0%
Avg Downhill Gradient
-11.9%
Uphill gradient distribution
| 2–5% | 9.1 km | |
|---|---|---|
| 5–10% | 10.7 km | |
| 10–15% | 7.9 km | |
| 15–20% | 5.4 km | |
| 20%+ | 6.6 km |
Route Profile
AnalysedTerrain breakdown
| 39.7% | Uphill |
|---|---|
| 20.3% | Flat |
| 40.1% | Downhill |
Terrain
XTERRA O-SEE Ultra Trail – 100.2 km 100km Top Climbs
Top Climbs
| 1 | 6.1 km · 354 m gain starts km 75 · avg 5.8% · max 54.9% |
|---|---|
| 2 | 2.8 km · 258 m gain starts km 66 · avg 9.2% · max 44.1% |
| 3 | 4.1 km · 254 m gain starts km 28 · avg 6.2% · max 43.7% |
Top descents
| 1 | 6.0 km · 273 m drop starts km 45 · avg -4.6% · max -29.5% |
|---|---|
| 2 | 5.0 km · 269 m drop starts km 69 · avg -5.3% · max -45.3% |
| 3 | 3.2 km · 252 m drop starts km 36 · avg -8.0% · max -46.8% |
Why O-SEE 100k Is Harder Than Its Elevation Looks?
Why O-SEE 100k Is Harder Than Its Elevation Looks?▼
Harder than the elevation figure suggests. The course covers 100.2 km with 3,451 m of gain (34.4 m/km), but the distance-weighted average uphill gradient of 12.04% — in the top ~10–14% of the DTR database — reflects a course that is almost constantly ascending or descending (only 20.3% flat). The biggest climb (354m at km 75) arrives after three-quarters of the race, with a 54.86% maximum gradient spike. Entry requires completion of a ≥75km trail race in the last five years.
Is O-SEE Ultra Trail an XTERRA race?
Is O-SEE Ultra Trail an XTERRA race?▼
Yes. The 2026 edition is part of the official XTERRA Trail Run European Championship. XTERRA is an internationally recognised multi-sport and trail running race series.
Getting There: Dresden, Prague, and the Train to Zittau
Which airport should I use for XTERRA O-SEE Ultra Trail?
▼
Dresden (DRS) and Prague (PRG) are both approximately 107 minutes by road — one of the few German trail races with genuine dual-airport flexibility. Train to Zittau is possible with a short last-mile transfer. Accommodation in the Zittau region fills quickly on race weekend — book early.
XTERRA O-SEE 100km Entry Fee: Three Price Tiers, No Processing Charges
How much does it cost to enter XTERRA O-SEE Ultra Trail 100km?
▼
€140 now (May–July 2026 window), rising to €150 from August 1 and €160 from October 9. No processing fees on the Baer registration platform. The AUTO €/km base rate is €1.30/km from the early-bird window.
October 17, 2026: The XTERRA O-SEE Ultra 100km in Kurort Oybin
When does the 2026 XTERRA O-SEE Ultra Trail 100km take place?
▼
October 17, 2026. Start and finish in Kurort Oybin, Saxony, Germany. 20-hour time limit.
XTERRA O-SEE Ultra Trail – 100.2 km 100km GPX
Getting to XTERRA O-SEE Ultra Trail – 100.2 km
Nearest airport
Dresden (DRS) / Prague (PRG)
Notes
Start: ~1–2.5 hrs drive to Zittau Olbersdorfer See area / Public transport: train to Zittau possible; last-mile short taxi or walk / Accommodation: limited in Zittau region on race weekend; book early
