Vilnius Trail Run 42.4km is a forest trail marathon-distance race looping through the city-edge forests, parks, and river valleys of Vilnius, Lithuania, starting and finishing at Kalnų parko stadionas (Hills Park). 10:00 start; 9-hour time limit. Next edition May 1, 2027 (2026 ran May 9, 2026). 42.4 km with 1,144 m D+ officially; DTR analysis gives 1,690 m and UTMB lists 1,390 m — the three use different measurement methods. Top single climb rises just 86m (rank 352 of 390 — only 38 climbs in the database rise less); top single descent drops 93m (rank 344 of 390).
Average uphill gradient of 8.3% (distance-weighted) ranks 317th of 390 — only 73 courses in the entire database are gentler on average uphill; top 19% most runnable for uphill character. Average downhill of -7.6% ranks 62nd of 390 (inverted scale) — only 61 courses have gentler average descent. D+/km ranks 320th of 390 (bottom 18% for elevation density). 35.7% flat terrain (rank 312 of 390). 0.8 km at 20%+ gradient. 77% unpaved / 16% paved / 7% other. 2 checkpoints (km 11.17, km 26.12). 68 finishers in 2025. UTMB 50K Index, ITRA 2 points, IAU Trail Label. €47–€55 / €1.11/km. Not sold out. Vilnius VNO at 30 minutes.