Sweden · Södermanland County
Distance
169 km
Date
Entry fee
SEK 1,950
€ / km
€1.10
New date pending
This race has already occurred. A new date for next year’s edition is pending.
The Sörmlands Trail Run 169km is a point-to-point forest ultra that runs south across Södermanland County, Sweden, from Gripholms Slott in Mariefred — a 16th-century castle on Lake Mälaren — to Nävekvarn Folkets Park, ending on the Baltic coast. The race starts at 12:00 on September 11, 2026, part of a larger weekend that features 100km and 50 km races. The 169km course is a flat trail run - just 2,800m (16.6 m/km) of altitude, with 55.8% of the terrain classified as flat — among the flattest 8% of the DTR European database.
Stats for trail runners: Distance-weighted average gradients are 5.7% uphill and 5.6% downhill and the biggest climb rises just 78 meters. All gradients are fully runnable, making this more of a distance-and-endurance challenge, not a mountain one.
Plenty of character and heart in the race event - the director is Billy White (chef, author, long-distance runner) who creates a race of 13 aid stations stocked by local restaurants and food producers; a 36-hour time limit; handmade wooden belt buckle and post-race sauna for finishers. A community race at heart.
The race enters its 5th edition in 2026. Entry costs 1,950–2,350 SEK (€1.10/km). Stockholm Skavsta Airport (NYO) is 13 minutes away if you can find a direct flight there.
Total Meters
2,800m
D+/KM
16.6m/km
For context, the Tor des Géants 330 loop has 73 D+/km.
Avg Uphill Gradient
5.7%
Avg Downhill Gradient
-5.6%
| 2–5% | 20.5 km | |
|---|---|---|
| 5–10% | 12.6 km | |
| 10–15% | 3.1 km | |
| 15–20% | 0.9 km | |
| 20%+ | 0.4 km |
| 21.9% | Uphill |
|---|---|
| 55.8% | Flat |
| 22.3% | Downhill |
| 1 | 2.6 km · 78 m gain starts km 23 · avg 2.9% · max 16.9% |
|---|---|
| 2 | 2.6 km · 70 m gain starts km 7 · avg 2.7% · max 21.7% |
| 3 | 2.0 km · 44 m gain starts km 103 · avg 2.2% · max 15.4% |
| 1 | 4.0 km · 86 m drop starts km 164 · avg -2.2% · max -14.3% |
|---|---|
| 2 | 3.1 km · 54 m drop starts km 97 · avg -1.7% · max -22.3% |
| 3 | 2.1 km · 49 m drop starts km 20 · avg -2.0% · max -32.4% |
Hard in the way only very long flat races are hard. The 169km course gains just 2,800m (~16.6 m/km), with 55.8% of the terrain flat — rank 360 of ~390 in the DTR database. DW average gradients are 5.72% uphill and 5.63% downhill; all gradient is fully runnable. The biggest climb rises 78m. The challenge is 169km of sustained aerobic effort, fatigue management, and night running (12:00 Friday start; head torch required). 36-hour time limit.
A point-to-point running south from Gripholms Slott in Mariefred (16th-century castle on Lake Mälaren) to Nävekvarn Folkets Park on the Baltic coast. 169km across 5 municipalities and 120+ private land parcels. 60% trail, 30% gravel, 10% asphalt, following the pre-marked Sörmlandsleden and Eriksgata networks. 13 aid stations approx every 13km; many at local restaurants and food producers. Cupless — bring your own cup. GPS tracker provided.
Entry is 1,950 SEK (Dec–Feb), 2,150 SEK (Mar–May), or 2,350 SEK (Jun–Sep 10) — approximately €1.10/km per DTR's AUTO calculation. Not sold out; registration closes September 10 or earlier if the race fills. Register via RaceID at sormlands100.com.
Stockholm Skavsta (NYO) is the closest at approximately 13 minutes from Nyköping, the race logistics hub. Wizzair serves NYO from Warsaw, Bucharest, and Belgrade; Norwegian flies seasonally. From Stockholm Arlanda (ARN), train or bus to Nyköping takes approximately 2 hours. Best base is Nyköping — plentiful accommodation and on the race shuttle bus route to the Mariefred start.
Almost everything. 55.8% flat, 2,800m D+ — in the flattest 8% of the DTR database. Aid stations at local restaurants and food producers. Race director Billy White is also a chef and author. Finishers receive a handmade wooden belt buckle. Post-race: sauna, locally produced hot food, alcohol-free craft beer. iRunFar profiled it as an Under the Radar race for its community character. It does not sell out fast.
Nearest airport
Stockholm Skavsta (NYO) / Stockholm Arlanda (ARN)
Notes
Start: Only 15 minutes by car or bus from NYO to Nyköping. Wizzair flies from Warsaw, Bucharest, Belgrade into NYO, Norwegian flies seasonally from Spain / Public transport: train/bus/car from ARN to Nyköping/Trosa region takes about two hours / Accommodation: Nyköping is the best base with plentiful lodging, and is a stop on the shuttle bus to race starts, as well as the start of the 50km race. Airbnbs available at race finish and other towns nearby (car recommended)
Ibiza Trail Maratón 48 km
Exclusive Discount - use ITMF-DISCOVERTRAIL26 CODE for 50% at checkout
