Austria · Tyrol
Distance
50 km
Date
Entry fee
€115
€ / km
€2.30
New date pending
This race has already occurred. A new date for next year’s edition is pending.
Mayrhofen Ultraks Zillertal 50km (RK50) is the shortest of three distances at Austria's Ultraks Zillertal festival in Mayrhofen, Tyrol — a UTMB Index race starting from Josef-Riedl-Platz in the heart of the Zillertal resort town and climbing into the surrounding alpine terrain. With 3,200m D+ over 48km of course, D+/km of 64m ranks 26th of 390 European ultras for vertical density — top 7% most vertical. The race is defined by extreme gradient steepness in both directions: average uphill gradient ranks 22nd of 390 European ultras (top 6% steepest), while average downhill gradient ranks 377th of 390 for gentleness — meaning only 13 races in the database have steeper average descent gradient. The single biggest descent drops 921m at an average gradient of -17.6%. Entry is €115 early bird (€130 from May 1; €140 from race day), plus a platform fee. Not sold out. Nearest airport: Innsbruck (INN), 65 minutes away — not classified as FAR. First held in 2019. 2026 race date: September 4.
Total Meters
3,200m
D+/KM
64.0m/km
For context, the Tor des Géants 330 loop has 73 D+/km.
Avg Uphill Gradient
17.4%
Avg Downhill Gradient
-18.8%
| 2–5% | 3.8 km | |
|---|---|---|
| 5–10% | 4.9 km | |
| 10–15% | 3.3 km | |
| 15–20% | 2.3 km | |
| 20%+ | 6.2 km |
| 42.6% | Uphill |
|---|---|
| 18.0% | Flat |
| 39.5% | Downhill |
| 1 | 7.7 km · 921 m gain starts km 5 · avg 12.0% · max 120.6% |
|---|---|
| 2 | 5.6 km · 687 m gain starts km 14 · avg 12.4% · max 77.3% |
| 3 | 2.9 km · 564 m gain starts km 2 · avg 19.4% · max 127.5% |
| 1 | 6.6 km · 932 m drop starts km 27 · avg -14.1% · max -82.0% |
|---|---|
| 2 | 3.5 km · 616 m drop starts km 39 · avg -17.5% · max -83.3% |
| 3 | 5.0 km · 579 m drop starts km 43 · avg -12.0% · max -116.7% |
The Mayrhofen Ultraks Zillertal 50km (RK50) covers 50km officially (48.08km by GPX analysis) with 3,200m D+ confirmed by both official figures and GPX measurement — no conflict. D+/km of 64m (based on nominal 50km) ranks 26th of 390 European ultras for vertical density — top 7% most vertical. GPX D- is 3,481m; the format is expected to be a loop or near-loop from Mayrhofen town centre — verify the 2026 route at mayrhofen.ultraks.com/en/rk50/. The race is a UTMB Index event. 2026 race date: September 4, 2026.
The RK50 starts from Josef-Riedl-Platz in central Mayrhofen, climbing from the Zillertal valley floor into the surrounding Tyrolean alpine terrain. The Ultraks Zillertal festival co-stages 70km and 101km distances on the same weekend, all based in Mayrhofen. The 101km (Z101) is the race's flagship distance. For the 2026 RK50 course map, checkpoint details, and cut-off times, check mayrhofen.ultraks.com/en/rk50/. GPX is available from the official site and UTMB Index.
The RK50 is defined by extreme gradient intensity in both ascent and descent. Average uphill gradient ranks 22nd of 390 European ultras (top 6% steepest), while average downhill gradient ranks 377th of 390 for gentleness — placing the RK50 among the 14 most technically demanding descent courses in European ultra running. The single biggest descent drops 921m at -17.55% average gradient. D+/km ranks 26th of 390. Approximately 21% of the course is nominally flat (Mayrhofen valley floor); the remaining 79% runs at extreme gradient in both directions. Technical singletrack, exposed ridgelines, and rocky alpine terrain characterize the mountain sections.
The 2026 RK50 entry is tiered: €115 (from January 1, 2026 — early bird), €130 (from May 1, 2026), and €140 (from September 4 — race day). A platform fee of €0.60 + 4.2% per participant applies in addition to the base price. The race is not sold out. The event is UTMB Index-rated. Registration is via time2win.at. Total festival capacity across all three distances is 1,574. Check mayrhofen.ultraks.com for current 2026 registration status.
The nearest airport is Innsbruck (INN), approximately 65 minutes from Mayrhofen — not classified as FAR. Munich (MUC) is approximately 2 to 2.5 hours by road. Public transport is good: trains run from Innsbruck into the Zillertal and a local Zillertalbahn connects to Mayrhofen. A car is not strictly required but useful for flexibility. Accommodation in Mayrhofen and the Zillertal is extensive (major ski resort valley) but fills early in September — book well in advance.
Nearest airport
Innsbruck (INN) / Munich (MUC)
Notes
Start: INN ~1 hr; MUC ~2–2.5 hrs / Public transport: Good (train into Zillertal + local) / Accommodation: Good but fills early (popular valley)
Ibiza Trail Maratón 48 km
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