Hong Kong, HK · January 2027
Hong Kong 100 Ultra Marathon
Hong Kong 100 Ultra Marathon pacing strategy with effort-based splits, nutrition timing, and course-specific risk notes for the 103 km ultra.
- Distance
- 103.00 km
- Elevation gain
- 4235 m
- Typical temp
- 12–20 °C
- Cutoff
- 30:00:00
The short version
A brutal course
- ▸Big climbing day — 4235 m up. Pace the ascents on effort, not the clock.
- ▸Low sun in your eyes around km 2–87 — bring a cap or shades.
- ▸Full overhead sun from km 36 — sunscreen and run the shaded side.
Next edition
16 January 2027
Typical race-day conditions
12–20 °C
We lock the real forecast into your plan in race week.
Course difficulty
BrutalDriven by 4235 m of climbing, 3757 m of quad-pounding descent. Harder than Hardrock Hundred Endurance Run (10.0), easier than Innsbruck Alpine Trailrun Festival K110 (10.0) — tougher than 81% of the races we cover.
Race data quality
Medium confidence
Last verified: 24/05/2026
Seeded from headline public race information. Official segment data should be imported before high-confidence split recommendations.
Elevation profile
Verified profile
Paid strategy guardrail
Official race packet remains source of truth
Step 1 · Free preview
See the course-adjusted plan first
Enter one recent result. The preview returns course cost, first splits, and fuel target from the deterministic engine and the current course data model.
VDOT
49.1
Estimate
9:48:00
Course cost
+107:44
Fuel target
90 g/h
First 5 km preview
full race locked
- km 15:56
- km 26:25
- km 34:51
- km 44:36
- km 54:57
First race free · then €7 Race Pass · no monthly subscription
Uses an approximate course model; verify final logistics against the official race packet.
Step 2 · Your full Hong Kong 100 Ultra Marathon plan
The preview shows the shape. The plan races it for you.
Course preview
Free
what you see now
- ✓Difficulty score & course data
- ✓Course-cost & toughest km
- ✓Your first full plan free, ever
Race Pass
€7
one-time, this race
- ✓Every km split, weather-adjusted
- ✓Nutrition & fluid timeline
- ✓Heat, wind & sun race tactics
- ✓Danger zones + watch file (GPX)
- ✓Race-week forecast & reminders
Annual
€19
per year, every race
- ✓Everything in Race Pass
- ✓Unlimited races, all year
- ✓Re-plan as your fitness changes
No subscription required — one race is a one-off €7. Cancel anytime on Annual.
Continue with approximate course data →Course elevation
4235 m total gain · 3757 m loss · max 890 m, min -1 m.
Fly the course
Sun & shade
Sun in your eyes
31 km
Sun on your back
14 km
Side / overhead
42 km
Expect low sun roughly in your eyes around km 2–87 — pack a peaked cap or shades; low glare hides kerbs and potholes. From km 36 the sun sits high overhead — peak UV and radiant heat, so keep sunscreen on and run the shaded side of the road where you can.
Approximate — solar position from the route geometry and a 08:00:00 start (timezone estimated from longitude), for a mid-pack finishing time.
Aid stations
9 stations on course — plan your fueling around them.
Race overview
Hong Kong 100 is one of Asia's defining 100 km ultras: runnable coastal sections, steep late climbs, and humid subtropical conditions. It is essential for Asian trail discovery.
How hard is this course?
Reference table — how the Hong Kong 100 Ultra Marathon compares to a flat sea-level course for four typical fitness levels. Computed from the route profile, mean course altitude, and typical race-week climate (16 °C / 75 % humidity). Your personal strategy uses your VDOT, per-km splits, nutrition timing, and the typical climate baseline for this static sample; paid strategies use Open-Meteo when a verified race date is inside the forecast window.
| Runner | Flat-course finish | Hong Kong 100 Ultra Marathon finish | Course cost | Adjusted pace |
|---|---|---|---|---|
| Beginner (VDOT 35) | 10:29:34 | 12:50:47 | +22.4% | 6:13/km |
| Intermediate (VDOT 45) | 8:35:00 | 10:30:32 | +22.4% | 5:05/km |
| Trained (VDOT 50) | 7:52:59 | 9:39:05 | +22.4% | 4:40/km |
| Competitive (VDOT 60) | 6:47:51 | 8:19:20 | +22.4% | 4:02/km |
Reference nutrition
For a 70 kg runner finishing in 9:39:05 at 16 °C. Adjust to your weight and tolerance — these are ISSN-window targets, not prescriptions.
- Carbs / hour
- 90 g
- Total carbs
- 869 g
- Fluid / hour
- 640 ml
- Sodium / hour
- 500 mg
FAQ
How should I pace Hong Kong 100 Ultra Marathon?
Treat the preview as an effort plan, not a fixed road-marathon pace table. The course model includes 5300 m of climbing, so climbs, descents, heat, and aid-station timing matter more than average pace.
How reliable is the current course data?
Seeded from headline public race information. Official segment data should be imported before high-confidence split recommendations.
Get your personalized strategy
The numbers above are samples. Sign up free and get the full Hong Kong 100 Ultra Marathon strategy from your VDOT, the current course model, Open-Meteo race-week forecast when available, and your nutrition preferences.
First race free · €7 per additional race · €19/yr for unlimited
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New to trail and ultra pacing? Start with our trail and ultra pacing guide or run the VDOT calculator.