Ultra-Trail Shudao by UTMB — DSD 100K
Ultra-Trail Shudao by UTMB
Jiange (Jiange County Sports Center) → Zhaohua Ancient City (Zhaohua, Guangyuan)
Race guide
Updated 19 July 2026
The DSD 100K is the headline distance of Ultra-Trail Shudao by UTMB, covering 104 km from Jiange County Sports Center to Zhaohua Ancient City in Guangyuan, Sichuan. With 3193 m of cumulative climbing and a high point of 1056 m, the course threads through the legendary Shudao — the ancient road network linking Sichuan to the north — combining forested ridgelines, river valleys and historic stone paths before finishing inside the walls of Zhaohua Ancient City. Starting at 502 m and finishing at 468 m, the overall elevation profile is deceptively moderate, but the accumulated gain and the sheer distance demand genuine respect. The cut-off for the finish is Day 2 at 23:00, giving runners a generous but firm window that rewards consistent movement over heroics.
Course & Terrain
The route runs point-to-point from Jiange County Sports Center to Zhaohua Ancient City, a logical journey along one of China's most culturally significant mountain corridors. The terrain is a genuine mix: early sections roll through valley floors and forested foothills where the trails are relatively runnable and deceptively inviting. As the course gains elevation toward its high point of 1056 m, runners encounter steeper, rooted singletrack typical of the Sichuan hill country — often narrow, occasionally technical, and rarely flat for long. The descent back toward the Jialing River basin and Zhaohua is sustained and leg-sapping, demanding controlled quad management rather than free-wheeling speed. Stone-paved sections of historic Shudao trail appear at intervals; they are beautiful but unforgiving underfoot, particularly when damp, so footwear with solid grip and moderate cushioning is strongly recommended.
Where the Race Is Won and Lost
With 3193 m of climbing spread across 104 km, no single climb is catastrophic — but that is precisely the trap. The early valley segments feel free and fast, and it is tempting to bank time by pushing hard through them. Resist this completely. The race is not decided in the first 40 or 50 km; it is decided on the far side of the biggest efforts, when accumulated fatigue meets whatever climbing remains. Runners who arrive at the mid-race climbs carrying tired legs from an overcooked opening hour will haemorrhage time on the ascents and lose confidence on the technical descents. Conversely, those who treat the opening half as a controlled deposit — moving efficiently but never redlining — arrive at the back half with reserves to actually race. The final push into Zhaohua Ancient City rewards the patient athlete, not the one who looked impressive at the first checkpoint.
Pacing Strategy
The winning approach on this course is deliberately social and conservative in the first half. If you feel you are going too easily through the valleys and early climbs, you are almost certainly going correctly. A patient first half is the deposit that funds a strong second — the runners who make up ground in the closing 30–40 km are invariably the ones who held back when the terrain invited excess. Once past the midpoint and the course's high point of 1056 m, shift gears methodically rather than all at once. Break the remaining distance into manageable segments — a psychological reset every major landmark — so the back half feels managed rather than survived. Trust your fitness and your legs in the final quarter; that is the moment to move with genuine intent toward the Zhaohua finish.
Fueling & Hydration
At 104 km with up to roughly 23 hours of racing time available, nutrition discipline is non-negotiable. The Sichuan climate can deliver significant heat and humidity, particularly during daylight hours, which elevates fluid and electrolyte needs well beyond what many runners from cooler climates will expect. Plan to take on sodium consistently rather than relying on thirst alone, and treat hydration as something to manage in deliberate resets — drinking to a schedule through the heat of the day rather than reacting to dehydration after it sets in. Caloric intake should begin early, within the first hour, and continue at regular intervals through the night section. Do not let the moderate elevation profile lull you into under-fueling; 3193 m of climbing still demands serious energy, and the legs that fade in the final 20 km are usually the legs that ran an early caloric deficit.
Conditions to Expect
The Guangyuan region of northern Sichuan sits in a transitional climate zone — warm and humid in summer, with the possibility of mist, rain and slippery trail surfaces at any point during a multi-hour event. Temperatures can vary significantly between the valley floors and the high point of 1056 m, so layering capacity in your pack is sensible even if conditions look benign at the start in Jiange. Night sections will be cooler; plan your kit accordingly and ensure your mandatory lighting is reliable, since the historic trail surfaces demand full visibility. If the course runs in warmer months, the heat through the valleys is the primary environmental variable to plan around — break it into segments mentally, manage your cooling actively at checkpoints, and never let a hot patch become a crisis.
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Checkpoints & cut-offs
✓ Course data verified against the official source (2026-07-05) · official source
0 km · 500 m · —
6.9 km · 540 m · —
16.4 km · 733 m · —
22.6 km · 982 m · —
36.1 km · 644 m · —
46 km · 711 m · —
57.1 km · 830 m · —
66.8 km · 754 m · —
77 km · 890 m · —
88.9 km · 942 m · —
98.1 km · 468 m · Sat 23:00
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