Jersey Marathon
Jersey Marathon race day weather
Mild temps, watch for wind
Runners will face temperatures starting at 59°F and rising to 61°F by the finish, with humidity at 78%. A steady wind from the SW will peak at 17 mph, creating headwinds during critical segments from miles 7-9 and 15-18. Competitors should adjust their pace on the climbs from miles 3 to 5 and stay cautious during exposed sections, particularly in the later stages of the race.
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Jersey Marathon route and elevation
The Jersey Marathon course has about 880 ft (268 m) of climbing and 878 ft (268 m) of descent, and finishes near the elevation it starts. It is hillier than 81% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. The hardest mile is mile 5, with 142 ft (43 m) of climbing and a 2.5% average grade.
Biggest climbs
- Miles 2.1 to 3.2: climbs about 135 ft (42 m).
- Miles 4.1 to 6: climbs about 170 ft (51 m).
- Miles 18.3 to 20.4: climbs about 110 ft (33 m).
What the hills cost
- 3:30 on a flat course is about 3:32 here (2 minutes slower).
- 4:00 on a flat course is about 4:02 here (2 minutes slower).
- 4:30 on a flat course is about 4:33 here (3 minutes slower).
Hills only, priced mile by mile on the course map. The pace calculator above adds the race-day weather.
Even-effort splits for a 3:30, 4:00 or 4:30 finish
| Mile | Climb | Descent | 3:30 | 4:00 | 4:30 |
|---|---|---|---|---|---|
| 1 | 49 ft | 50 ft | 7:54 | 9:02 | 10:10 |
| 2 | 33 ft | 42 ft | 7:53 | 9:01 | 10:08 |
| 3 | 130 ft | 42 ft | 8:40 | 9:54 | 11:08 |
| 4 | 149 ft | 69 ft | 8:36 | 9:49 | 11:03 |
| 5 | 142 ft | 12 ft | 9:02 | 10:20 | 11:37 |
| 6 | 32 ft | 4 ft | 8:09 | 9:19 | 10:29 |
| 7 | 9 ft | 38 ft | 7:48 | 8:55 | 10:02 |
| 8 | 12 ft | 25 ft | 7:52 | 8:59 | 10:07 |
| 9 | 15 ft | 9 ft | 7:59 | 9:07 | 10:15 |
| 10 | 7 ft | 39 ft | 7:47 | 8:54 | 10:02 |
| 11 | 22 ft | 16 ft | 7:59 | 9:07 | 10:15 |
| 12 | 38 ft | 21 ft | 8:04 | 9:13 | 10:22 |
| 13 | 14 ft | 46 ft | 7:47 | 8:55 | 10:01 |
| 14 | 28 ft | 25 ft | 7:57 | 9:04 | 10:13 |
| 15 | 17 ft | 43 ft | 7:49 | 8:56 | 10:03 |
| 16 | 9 ft | 28 ft | 7:51 | 8:58 | 10:05 |
| 17 | 18 ft | 27 ft | 7:53 | 9:01 | 10:08 |
| 18 | 0 ft | 81 ft | 7:37 | 8:42 | 9:48 |
| 19 | 60 ft | 19 ft | 8:16 | 9:27 | 10:38 |
| 20 | 61 ft | 17 ft | 8:17 | 9:28 | 10:39 |
| 21 | 11 ft | 27 ft | 7:51 | 8:59 | 10:06 |
| 22 | 20 ft | 136 ft | 7:31 | 8:35 | 9:39 |
| 23 | 29 ft | 127 ft | 7:34 | 8:39 | 9:44 |
| 24 | 39 ft | 27 ft | 8:01 | 9:10 | 10:19 |
| 25 | 13 ft | 22 ft | 7:53 | 9:00 | 10:08 |
| 26 | 63 ft | 34 ft | 8:09 | 9:19 | 10:28 |
| Last 0.2 | 11 ft | 1 ft | 1:51 | 2:07 | 2:23 |
Explore the Jersey Marathon course with the weather and your pace along the route, or compare it with other races.
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About the Jersey Marathon
The Jersey Marathon runs each October in St Helier, the capital of Jersey in the Channel Islands. The course starts and finishes at Weighbridge Place, heading west into Waterworks Valley before crossing the island's north and west parishes through St Ouen and St Brelade. Runners can also enter as a two- or five-person relay team covering the full course, or run the one-mile Marathon Mile. Kenya's Nathan Kioko holds the men's course record at 2:16:03 from 2023, and Alice Braham set the women's record of 2:40:47 in 2025.
