Saturday, June 5, 2027Forksville, PA
Worlds End Ultramarathon
View on RunSignup ↗Registration opens Dec 5, 2026
2 events
- 100k100KUltraStarts 5:00 AM
- 50k50KUltraStarts 7:00 AM
Location
Approximate, from the race's ZIP code.
Typical race-day weatherFair weather · 69/100
- High / low
- 73° / 53°F
- 23° / 12°C
- Humidity
- 80%
- Dew point 56°F
- Chance of rain
- 50%
- Wind
- 4 mph
- Average
- Usually warm for an ultra: about 65°F while racing.
- Humid: dew point around 56°F.
- Rain on about 50% of days around this date.
Averages for this area and time of year over the last 20 years, from NASA POWER data. Not a forecast.
Past results
- 26% slowerFinish times are typically 26% slower than at other trail 50Ks.4 years, 580 finishers; men and women compared separately.
- Typical timesFinish times are typical for trail 100Ks.3 years, 335 finishers; men and women compared separately.
- 12% slowerFinish times are typically 12% slower than at other 100Ks.1 year, 131 finishers; men and women compared separately.
| Year | Event | Finishers | Median | Men | Women |
|---|---|---|---|---|---|
| 2026 | 100k · 100K | 131 | 17:07:47 | 17:09:38 | 16:35:14 |
| 2026 | 50k · 50K | 168 | 8:14:56 | 8:09:32 | 8:26:39 |
| 2025 | 100k · 100K | 115 | 17:57:24 | 17:57:48 | 17:49:07 |
| 2025 | 50k · 50K | 136 | 8:55:12 | 8:23:14 | 9:44:55 |
| 2024 | 100k · 100K | 116 | 17:23:28 | 17:15:10 | 17:31:28 |
| 2024 | 50k · 50K | 141 | 8:57:11 | 8:30:12 | 9:43:29 |
| 2023 | 100k · 100K | 104 | 17:04:59 | 16:45:24 | 17:20:58 |
| 2023 | 50k · 50K | 135 | 8:49:42 | 8:06:11 | 9:29:04 |
Median finish times from results published on RunSignup. Keyrace keeps only these summaries, never individual results. A fast or slow field affects times as much as the course does.