The Tor des Géants ("Tour of the Giants") is a non-stop, single-stage 330 km mountain ultra around the Aosta Valley in northern Italy, held in mid-September. The course climbs 24,000 m (78,700 ft) — equivalent to summiting Everest from sea level nearly three times — across two of the highest haute routes in the Alps. Cutoff: 150 hours (six days, six hours). It is widely considered the most demanding non-stop ultramarathon in the world.

The course

A clockwise loop starting and finishing in Courmayeur (the same Italian alpine town that is the mid-point of UTMB). The course follows the Alta Via 1 and Alta Via 2 — two high-mountain trekking routes typically completed over 7–10 days each. The Tor combines them into a single non-stop loop, climbing over 25 mountain passes, most above 2,500 m.

Major terrain:

  • Cresta dell'Arp ridge — exposed scramble at 2,600 m
  • Col Loson — 3,300 m, the highest point of the race
  • Rifugio Frassati and the rifugio network — manned mountain huts every 15–25 km that double as aid stations
  • Multiple glacier-adjacent crossings; some sections require fixed cables/chains

Most finishers spend 100–130 hours on course. The fastest run sub-75. The slowest run right up to the 150-hour cutoff. Field size is about 1,000 runners; finish rate hovers around 50%.

By the numbers

  • Distance: 330 km / 205 miles
  • Vert gain: 24,000 m / 78,700 ft
  • Vert per mile: ~384 ft/mi (extreme mountain)
  • High point: Col Loson, 3,300 m / 10,800 ft
  • Cutoff: 150 hours (6 days, 6 hours)
  • Surface: singletrack, scree, glacier-adjacent rock, fixed cables, occasional Via Ferrata sections
  • Aid stations / rifugios: ~25 stations, mix of formal Tor checkpoints and Italian alpine club rifugios
  • Date: mid-September (Sunday start)

Sleep strategy is the race

Tor is decided by sleep more than fitness. The cutoff allows for ~6 days, which means a typical mid-pack finisher will need to sleep 4–8 hours per 24-hour cycle to maintain cognitive function, decision-making, and tolerance of altitude.

Three sleep strategies exist:

  • Polyphasic: 30–60 min naps every 12–18 hours at rifugios. Total sleep across the race: 6–10 hours. Used by elites.
  • Mid-pack standard: One 2–3 hour sleep block + 1–2 short naps per day. Total: 12–18 hours of sleep across the race.
  • Conservative: 4–5 hours per night plus naps. Used by runners targeting the cutoff. Risk: too much sleep and you miss the 150-hour cutoff.

Sleep is taken at "Life Bases" — five major checkpoints with cots, blankets, and showers (Valgrisenche, Cogne, Donnas, Gressoney, Valtournenche) — and at rifugios mid-section. Many runners pre-position drop bags at Life Bases with sleep gear and clean clothes.

How to qualify

Qualifying for Tor des Géants requires:

  • One ultra of 100+ km in the qualifying window (typically last 24–30 months)
  • OR a finish at one of the recognized 200+ km mountain ultras (Bigfoot 200, UTMB 100M, Tor130, etc.)
  • Lottery selection — Tor des Géants is oversubscribed roughly 3:1; international entries even more

There is also a Tor des Glaciers (450 km, 32,000 m vert) and a Tor130 (130 km) for less-qualified runners or those building toward the full Tor.

Gear strategy

  • Vest: 15L for the mandatory kit and weather variability. Salomon Adv Skin 12 or UltrAspire Zygos 5.0.
  • Poles: Mandatory in spirit. LEKI Cross Trail FX or Black Diamond Distance Carbon Z. Y-shaped baskets (sturdier on Italian alpine terrain than running poles).
  • Shoes: Mountain-aggressive lugs. Hoka Speedgoat 6, Salomon S/Lab Genesis, La Sportiva Mutant. Two pairs minimum, swap at Life Bases.
  • Layers: Mandatory waterproof shell + insulated mid-layer + warm hat + gloves. The Col Loson section can drop below freezing even in September. Patagonia Storm10 + R1 Air pullover is a popular combination.
  • Headlamp: Two required. Primary: Petzl Nao RL or Black Diamond Sprint 225. Backup: Petzl ACTIK Core. Multiple battery sets.
  • GPS / phone: Course is well-marked but exposure is real. Carry a phone with offline maps (Komoot or Mapy.cz) and a satellite communicator (Garmin inReach Mini 2) is a smart-not-required addition.
  • Anti-chafe + foot care: Bring more than you think. 5+ days on feet in mountain shoes destroys skin. Trail Toes, Body Glide, Aquaphor in your drop bag.

Pacing strategy

Tor pacing is unlike any other race because it spans 5+ days. Most successful Tor finishers describe the race as "five back-to-back hard hiking days, with running on the descents and flats." Trying to run the climbs early in the race blows up the legs for the remaining 200+ km.

Veterans recommend:

  • Walk every climb. Run every descent (carefully) and flat (when there is one).
  • Eat at every aid station and every rifugio. The Italian alpine club hut food (polenta, soup, prosciutto, cheese) is excellent and provides real calories.
  • Pre-plan sleep windows before the race. Don't decide where to sleep when you're 60 hours in and exhausted.
  • The race opens with the hardest section. The Col Loson day breaks runners early; respect it.

Crew + pacing rules

Pacers are not allowed. Crew is allowed at the five Life Bases only — the other 20 aid stations are runner-self-supported. Most international runners hire a Courmayeur-based shuttle/crew service rather than trying to navigate the Italian alpine roads themselves between Life Bases.

The Tor experience

Tor des Géants has a different feel than UTMB or Western States. It's slower, lonelier, more contemplative. The Italian rifugio network — small mountain huts staffed by volunteers, serving warm soup at 3 AM at 8,000 ft — is unlike any aid network in the U.S. ultra scene. The night sections through high passes, with only your headlamp and the occasional bell of a grazing cow, are described by Tor finishers as among the most profound hours they've spent outdoors.

Most who finish describe the Tor as the hardest thing they've ever done — and many return. Tor is not a race you do once.