Fountain Hills, US · October 2026
Javelina Jundred
Javelina Jundred pacing strategy with effort-based splits, nutrition timing, and course-specific risk notes for the 161 km ultra.
- Distance
- 161.00 km
- Elevation gain
- 2400 m
- Typical temp
- 10–30 °C
- Cutoff
- 30:00:00
The short version
A brutal course
- ▸Big climbing day — 2400 m up. Pace the ascents on effort, not the clock.
Next edition
31 October 2026
Typical race-day conditions
10–30 °C
We lock the real forecast into your plan in race week.
Course difficulty
BrutalDriven by 2400 m of climbing, 2400 m of quad-pounding descent, typical race-day heat (~20 °C). Harder than Innsbruck Alpine Trailrun Festival K110 (10.0), easier than Jungfrau-Marathon (10.0) — tougher than 84% of the races we cover.
Race data quality
Medium confidence
Last verified: 24/05/2026
Loop format and headline data are suitable for preview. Aid station and heat plan details should be upgraded with current race guide data.
Elevation profile
Approximate course model
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
13:08:30
Course cost
+37:30
Fuel target
90 g/h
First 5 km preview
full race locked
- km 15:17
- km 24:44
- km 35:30
- km 45:21
- km 55:16
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 Javelina Jundred 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
2400 m total gain · 2400 m loss · max 760 m, min 500 m.
Aid stations
20 stations on course — plan your fueling around them.
Race overview
Javelina Jundred is a major US 100-miler with loop logistics, desert heat, and high runnable pressure. It is a different pacing problem from alpine ultras: restraint, cooling, and repeatable fueling matter most.
How hard is this course?
Reference table — how the Javelina Jundred 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 (20 °C / 35 % 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 | Javelina Jundred finish | Course cost | Adjusted pace |
|---|---|---|---|---|
| Beginner (VDOT 35) | 16:24:08 | 17:13:17 | +5% | 6:17/km |
| Intermediate (VDOT 45) | 13:25:12 | 14:05:25 | +5% | 5:08/km |
| Trained (VDOT 50) | 12:19:38 | 12:56:34 | +5% | 4:43/km |
| Competitive (VDOT 60) | 10:38:08 | 11:10:00 | +5% | 4:04/km |
Reference nutrition
For a 70 kg runner finishing in 12:56:34 at 20 °C. Adjust to your weight and tolerance — these are ISSN-window targets, not prescriptions.
- Carbs / hour
- 90 g
- Total carbs
- 1165 g
- Fluid / hour
- 690 ml
- Sodium / hour
- 500 mg
FAQ
How should I pace Javelina Jundred?
Treat the preview as an effort plan, not a fixed road-marathon pace table. The course model includes 2400 m of climbing, so climbs, descents, heat, and aid-station timing matter more than average pace.
How reliable is the current course data?
Loop format and headline data are suitable for preview. Aid station and heat plan details should be upgraded with current race guide data.
Get your personalized strategy
The numbers above are samples. Sign up free and get the full Javelina Jundred 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.