Grindelwald, CH · July 2026
Eiger Ultra Trail E101
Eiger Ultra Trail E101 pacing strategy with effort-based splits, nutrition timing, and course-specific risk notes for the 101 km ultra.
- Distance
- 101.00 km
- Elevation gain
- 5912 m
- Typical temp
- 5–22 °C
- Cutoff
- 28:00:00
The short version
A brutal course
- ▸Big climbing day — 5912 m up. Pace the ascents on effort, not the clock.
- ▸Low sun in your eyes around km 8–15 — bring a cap or shades.
- ▸Full overhead sun from km 37 — sunscreen and run the shaded side.
Next edition
18 July 2026
Typical race-day conditions
5–22 °C
We lock the real forecast into your plan in race week.
Course difficulty
BrutalDriven by 5912 m of climbing, altitude up to 2614 m, 5912 m of quad-pounding descent. Harder than Diagonale des Fous (10.0), easier than Hardrock Hundred Endurance Run (10.0) — tougher than 79% of the races we cover.
Race data quality
Medium confidence
Last verified: 24/05/2026
Seeded from headline public race data. Needs official course file import for high-confidence segment 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
13:00:54
Course cost
+309:59
Fuel target
90 g/h
First 5 km preview
full race locked
- km 15:16
- km 27:42
- km 35:50
- km 46:22
- km 59:56
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 Eiger Ultra Trail E101 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
5912 m total gain · 5912 m loss · max 2614 m, min 898 m.
Fly the course
Sun & shade
Sun in your eyes
16 km
Sun on your back
29 km
Side / overhead
48 km
Expect low sun roughly in your eyes around km 8–15 — pack a peaked cap or shades; low glare hides kerbs and potholes. From km 37 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 04:00:00 start (timezone estimated from longitude), for a mid-pack finishing time.
Aid stations
8 stations on course — plan your fueling around them.
Race overview
Eiger Ultra Trail is a flagship Swiss alpine ultra with high vertical density and exposed mountain weather. It is a natural DACH/Alps race page for runners who need effort-based climbing and descending guidance.
How hard is this course?
Reference table — how the Eiger Ultra Trail E101 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 (14 °C / 65 % 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 | Eiger Ultra Trail E101 finish | Course cost | Adjusted pace |
|---|---|---|---|---|
| Beginner (VDOT 35) | 10:17:20 | 17:03:42 | +65.8% | 6:26/km |
| Intermediate (VDOT 45) | 8:24:59 | 13:57:24 | +65.8% | 5:16/km |
| Trained (VDOT 50) | 7:43:46 | 12:49:03 | +65.8% | 4:50/km |
| Competitive (VDOT 60) | 6:39:53 | 11:03:07 | +65.8% | 4:10/km |
Reference nutrition
For a 70 kg runner finishing in 12:49:03 at 14 °C. Adjust to your weight and tolerance — these are ISSN-window targets, not prescriptions.
- Carbs / hour
- 90 g
- Total carbs
- 1154 g
- Fluid / hour
- 640 ml
- Sodium / hour
- 500 mg
FAQ
How should I pace Eiger Ultra Trail E101?
Treat the preview as an effort plan, not a fixed road-marathon pace table. The course model includes 6700 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 data. Needs official course file import for high-confidence segment recommendations.
Get your personalized strategy
The numbers above are samples. Sign up free and get the full Eiger Ultra Trail E101 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
Get my Eiger Ultra Trail E101 strategyRelated races
- Swissalpine Davos K68· Davos2600 m gain · typical 4–20 °CEiger Ultra Trail E101 vs Swissalpine Davos K68 — which is harder? →
- CCC by UTMB· Courmayeur5493 m gain · typical 12–25 °CEiger Ultra Trail E101 vs CCC by UTMB — which is harder? →
- Innsbruck Alpine Trailrun Festival K110· Innsbruck3088 m gain · typical 5–20 °CEiger Ultra Trail E101 vs Innsbruck Alpine Trailrun Festival K110 — which is harder? →
- Lavaredo Ultra Trail· Cortina d'Ampezzo5118 m gain · typical 10–20 °CEiger Ultra Trail E101 vs Lavaredo Ultra Trail — which is harder? →
New to trail and ultra pacing? Start with our trail and ultra pacing guide or run the VDOT calculator.