Longest Ski Run Index 2026

Two contenders share the title depending on definition. The Vallée Blanche (Chamonix, France) is 22 km from Aiguille du Midi (3,842 m) to Chamonix village (1,035 m) with 2,807 m vertical — the longest lift-served descent in the Alps. However, it is off-piste glacial terrain (ungroomed, requires IFMGA guide, no patrol), not technically a 'ski run' in the marked-piste sense. The Sarenne at Alpe d'Huez (France) is the longest signed and patrolled black piste in the world at 16 km with 1,860 m vertical. For longest signed red piste: the Klein Matterhorn-to-Cervinia cross-border descent (22 km, 1,833 m vertical) — entirely on red piste, fully marked and patrolled, crossing from Switzerland into Italy.

Six long runs are graded red and accessible to confident intermediates: (1) Klein Matterhorn → Cervinia (22 km red, Zermatt-Cervinia cross-border) — the world's longest signed red descent; (2) Sarenne (16 km but graded black — technically expert; the lower 8 km Plat des Marmottes traverse is graded red and accessible); (3) Trois Vallées traverse Val Thorens → Courchevel (16 km, all red); (4) Cima Bianca → Cervinia (13 km red, Italy's longest single-resort red); (5) Pic Blanc → Oz (14 km red, Alpe d'Huez); (6) Schwarze Schneid → Sölden (15 km red, Austrian glacier-to-village). All six require fitness for a 2.5–4 hour descent with limited stopping locations — intermediates should pace themselves with 3–4 strategic stops and carry water.

Piste length is the distance skied along the surface — what you cover. Vertical drop is the elevation difference between top and bottom — what your legs work against. The Vallée Blanche covers 22 km but only 2,807 m vertical (mostly low-angle glacier flow). The Streif at Kitzbühel covers only 3.3 km but with 860 m vertical concentrated in three near-vertical pitches — a far more demanding descent than its length suggests. For intermediate-progression long runs, look for long length + moderate vertical (e.g. Klein Matterhorn → Cervinia: 22 km length but only 1,833 m vertical = average 8.3% gradient — comfortable sustained red). For expert-progression long runs, look for moderate length + high vertical (e.g. Aiguille Rouge → Villaroger at Les Arcs: 7 km length, 2,026 m vertical = average 29% gradient — sustained expert pitch).

Yes for Vallée Blanche (Chamonix), Galtiberg (Engelberg), Vallons de la Meije (La Grave), Funivia Toula (Courmayeur south side) and any Mont-Fort off-piste extension (Verbier). All five are glacial or high-mountain terrain with crevasse hazard, avalanche exposure and no on-piste rescue patrol. IFMGA-certified mountain guide cost typical range: €80–€120 per person in groups of 4–6, €260–€420 private 1-1 guiding. Booking via the resort's official guide bureau (Compagnie des Guides de Chamonix, Bergführerverein Engelberg, etc.) is the safest route — verify IFMGA credentials, ask about avalanche transceiver/shovel/probe equipment provision, and confirm guide-to-client ratio before booking. Patrolled long red and black runs (Sarenne, Klein Matterhorn → Cervinia, Streif) do not require a guide.