Ultra Trail Whistler by UTMB
Ultra Trail Whistler by UTMB (100K)
Creekside (Whistler Blackcomb) → Whistler Village (Spruce Grove Park)
Race guide
Updated 19 July 2026
Ultra Trail Whistler by UTMB is a 100 km mountain race starting at Creekside Plaza (657 m) and finishing in Whistler Village at Spruce Grove Park (654 m), threading through the iconic terrain of Whistler and Blackcomb mountains. With 4,809 m of total climbing and a high point of 2,164 m, the course demands both technical mountain competence and shrewd race management. The route links two world-class ski resorts across alpine ridges, forested trails, and sustained climbs — a genuine mountain ultra in a compact but relentless package. Despite its relatively modest high point by UTMB-series standards, the course earns every metre of that 4,809 m D+ through repeated significant ascents and descents. Runners should expect no easy miles: the terrain between Creekside and the Roundhouse Aid Station alone involves nearly 1,200 m of climbing in the opening 18 km, and the back half of the course — from Rendezvous Aid Station back to Whistler Village — demands legs that have been carefully preserved through the first 65 km. The final cut-off at the finish is Day 05:00, setting the clock firmly in place.
Course & Terrain Overview
The race begins at Creekside Plaza (657 m, km 0) and immediately sets its intentions: the opening segment climbs aggressively toward the Roundhouse Aid Station at 1,828 m by km 18, a sustained ascent of over 1,170 m that takes runners up Whistler Mountain into the alpine. This early high point at 1,828 m is not a gentle warm-up — it is one of the biggest individual climbs of the entire race. From the Roundhouse, the course threads through the interconnected mountain terrain between Whistler and Blackcomb, eventually reaching the Rendezvous Aid Station on the Blackcomb descent at 972 m and km 65. The final 35 km from Rendezvous back to Spruce Grove Park in Whistler Village (654 m) completes the loop. The terrain throughout alternates between open alpine, exposed ridge lines near the 2,164 m high point, and forested British Columbia trail — often rooted, often technical underfoot. The valley sections can feel deceptively runnable and fast, but they are recovery windows, not free speed. Technical descents off both Whistler and Blackcomb demand confident footwork and controlled quad effort; saving your legs on these sections pays enormous dividends in the back 35 km.
Decisive Climbs & Where the Race Is Won or Lost
The climb to the Roundhouse Aid Station (km 18, 1,828 m) is the race's first major test and its most common trap. Runners who treat this early ascent as a time to make up ground or chase faster competitors typically unravel somewhere in the middle third. The sheer volume of climbing in the opening 18 km — over 1,170 m — loads the legs before the true high point of the course at 2,164 m has even been reached. Running into the Roundhouse with anything left in the tank is not weakness; it is the correct strategy. The real race reveals itself in the kilometres following the Rendezvous Aid Station at km 65. By this point, runners have accumulated the bulk of the 4,809 m D+ and have descended into the mid-mountain elevation of 972 m. The closing 35 km from Rendezvous to Spruce Grove Park is where patience deposited in the first half pays out. Legs that were not hammered on the early descents off Whistler Mountain, and a cardiovascular system not blown in the alpine, can still run the flats and technical singletracks of this final stretch. Those who went too hard before km 65 are reduced to a survival march.
Pacing Strategy: The Patient First Half
The single most important strategic principle on this course is restraint before km 65. The early valley sections and runnable forest trails between major climbs create a powerful psychological invitation to push — resist it entirely. Treat the opening 65 km as a controlled deposit: hike the steep sections even when you feel capable of running them, keep your breathing genuinely conversational, and let faster starters go. The data and experience from this event is unambiguous — the record-level performances have come from athletes who went out easy, not hard. A practical mental framework for the back half is to break the remaining distance into bite-sized resets rather than staring at the full 35 km. Think in segments of two or three aid station-to-aid station blocks, each one a manageable target. This converts what feels like an intimidating closing stretch into a series of achievable commitments. Once you've cleared Rendezvous at km 65, you are in the closing act — trust the fitness you've built and allow yourself to push. The finish cut-off of Day 05:00 at Spruce Grove Park is your hard ceiling; build your pacing plan with enough buffer to absorb weather, unexpected terrain difficulty, or a bad patch in the final 20 km.
Fueling & Nutrition
With 100 km and 4,809 m of climbing, caloric demand is high and consistent throughout. The checkpoint structure — Roundhouse at km 18, Rendezvous at km 65 — means runners must carry sufficient fuel and hydration for two long unsupported stretches. The gap between the Roundhouse (km 18) and Rendezvous (km 65) spans 47 km through the most committing terrain on the course; this is the section where under-fueling is most dangerous and most common. Prioritise eating early and often, before hunger arrives — especially in the alpine sections around the 2,164 m high point where altitude can suppress appetite and cold air masks caloric deficit. Hydration strategy must account for the significant elevation change: sweating rates drop in the cold alpine and spike again when descending back into the valley. Carry electrolytes as a matter of discipline, not just when you feel depleted. At Rendezvous (km 65, 972 m), take a deliberate resupply — top up both calories and fluids before the final 35 km push, even if you feel strong in that moment.
Conditions & What to Expect
Whistler's mountain weather is characteristically variable and should never be underestimated. The race moves from valley level (657 m at Creekside) to alpine exposed terrain at 2,164 m, a range where temperature differentials of 10–15°C between the start line and high point are entirely normal. Morning starts from Creekside can feel mild or even warm, while the Roundhouse and the alpine sections near the high point can deliver cold, wind, and rapidly moving cloud cover. A lightweight waterproof shell and insulation layer are not optional kit — they are mandatory race insurance. The Whistler region receives substantial rainfall, and trails can be muddy and slippery, particularly in the forested sections where roots are exposed. Traction footwear with grip suited to wet rock and rooted terrain is strongly recommended. UV exposure on the open alpine ridgelines is significant on clear days; sun protection and eye protection matter. Finally, be prepared mentally for temperature swings across the full duration of the race — what begins as a cool morning at Creekside may turn warm in the valleys by mid-race, requiring on-the-fly layering decisions at aid stations.
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Checkpoints & cut-offs
✓ Course data verified against the official source (2026-07-05) · official source
0 km · 654 m · —
2.9 km · 985 m · —
11.7 km · 2165 m · —
21.6 km · 1833 m · Sat 10:30
29.6 km · 769 m · Sat 12:30
31.6 km · 1191 m · —
35.2 km · 1860 m · Sat 13:30
43.5 km · 1194 m · —
48 km · 773 m · Sat 16:00
51.9 km · 639 m · —
61.9 km · 785 m · Sat 19:30
70.7 km · 603 m · Sat 21:30
81.5 km · 646 m · Sun 00:00
88.8 km · 645 m · Sun 01:30
100.3 km · 691 m · —
102.8 km · 646 m · Sun 05:00
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