DFBG 100 Mile Trail: 170km Through the Sudetes, Measured

The DFBG 100 Mile Trail (Polish: Sto Mil Trail) is a 170km ultramarathon through the Sudetes of Lower Silesia, Poland, starting in Dlugopole-Zdroj and finishing in Ladek-Zdroj. Introduced in 2025 as a new distance at the Dolnoslaski Festiwal Biegow Gorskich (DFBG), it is in only its second edition in 2026. The course gains 5,193m D+ with a 38-hour cut-off and a 05:00 Friday July 17 start, capped at 150 runners. It carries 6 ITRA points and is a UTMB Index 100M event -- the strongest qualifier credential of any DFBG distance. Inaugural 2025 course records: Jakub Gorzelanczykz 19:16:51 (men); Justyna Folenga 23:26:00 (women).

Demanding at the duration and volume level rather than through extreme gradient. The course carries 5,193m D+ over 170km (30.6 m/km) with an 8.26% distance-weighted average uphill gradient and -8.25% average downhill gradient (both LOWER-MID tier) -- a near-perfectly symmetric profile. The race opens with a 5km climb from km 0.03 and closes with a 5.28km technical descent into Ladek-Zdroj after 166km. Runners complete one full overnight period (05:00 Friday to cut-off ~19:00 Saturday). No DNF rate data is available for the 2025 inaugural edition. The 38-hour cut-off, overnight element, and balanced 170km gradient demand are the primary challenges.

Yes. The 170km carries 6 ITRA points and is a UTMB Index 100M event -- the strongest qualifier of any DFBG distance. With 6 ITRA points, it qualifies runners for UTMB events in the Endurance and above categories. Points are awarded to finishers; confirm current eligibility requirements at itra.run before registering. The 2026 edition is only the 2nd edition of this distance; expect the course record to be competitive from a small but motivated 150-runner field.

The 2026 edition starts at 05:00 on Friday, July 17 in Dlugopole-Zdroj, with a 38-hour cut-off (approximately 19:00 on Saturday July 18, finish in Ladek-Zdroj). Entry costs 480-540 PLN depending on registration date (approximately EUR 112-126 / EUR 0.65/km at standard rates, plus a ~2.5% B4Sport platform fee). Registration is open at b4sportonline.pl with a 150-runner cap. The race finishes in Ladek-Zdroj (the festival base); transport from the Dlugopole-Zdroj start to your accommodation needs planning.

Wroclaw Copernicus Airport (WRO) is approximately 105 minutes by car to the festival base in Ladek-Zdroj; the race start in Dlugopole-Zdroj is approximately 15 minutes further. Prague Vaclav Havel Airport (PRG) and Dresden Airport (DRS) are also viable for international runners. A rental car is strongly recommended -- public transport to the Sudetes valley requires a train to Klodzko then bus or taxi. Accommodation in the Ladek-Zdroj / Stronie Slaskie area fills fast given the festival draws 5,500 total runners; book early. Unlike the 130km Super Trail, the 100 Mile Trail finishes in Ladek-Zdroj (the festival hub), making post-race logistics more convenient -- plan transport to the Dlugopole-Zdroj start before race day.