Antelope Island Marathon
Antelope Island Marathon race day weather
Cool conditions, steady finish ahead
Runners will face a start temperature of 45°F, gradually rising to 56°F by race end. With light winds and moderate humidity at 52%, runners should maintain a steady pace throughout. The gently rolling terrain will be manageable, but the climbs at miles 3 and 21 may require extra effort. Starting conservatively will be key, especially with temperatures still cool at the gun.
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Antelope Island Marathon route and elevation
The Antelope Island Marathon course has about 870 ft (265 m) of climbing and 871 ft (265 m) of descent, and finishes near the elevation it starts. It is hillier than 89% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. The hardest mile is mile 21, with 133 ft (41 m) of climbing and a 2.5% average grade.
Biggest climbs
- Miles 2.2 to 2.6: climbs about 130 ft (40 m).
- Miles 3.6 to 4.7: climbs about 180 ft (54 m).
- Miles 18.2 to 21.2: climbs about 225 ft (68 m).
What the hills cost
- 3:30 on a flat course is about 3:33 here (3 minutes slower).
- 4:00 on a flat course is about 4:04 here (4 minutes slower).
- 4:30 on a flat course is about 4:34 here (4 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 | 75 ft | 1 ft | 8:31 | 9:44 | 10:57 |
| 2 | 5 ft | 71 ft | 7:39 | 8:45 | 9:50 |
| 3 | 131 ft | 16 ft | 8:53 | 10:09 | 11:25 |
| 4 | 85 ft | 59 ft | 8:07 | 9:16 | 10:26 |
| 5 | 93 ft | 2 ft | 8:40 | 9:55 | 11:09 |
| 6 | 0 ft | 109 ft | 7:31 | 8:35 | 9:40 |
| 7 | 0 ft | 77 ft | 7:37 | 8:42 | 9:47 |
| 8 | 0 ft | 32 ft | 7:46 | 8:53 | 10:00 |
| 9 | 18 ft | 3 ft | 8:02 | 9:10 | 10:19 |
| 10 | 13 ft | 11 ft | 7:55 | 9:03 | 10:11 |
| 11 | 2 ft | 11 ft | 7:52 | 9:00 | 10:07 |
| 12 | 28 ft | 4 ft | 8:06 | 9:15 | 10:25 |
| 13 | 21 ft | 7 ft | 8:01 | 9:10 | 10:19 |
| 14 | 17 ft | 14 ft | 7:56 | 9:04 | 10:11 |
| 15 | 4 ft | 45 ft | 7:44 | 8:51 | 9:57 |
| 16 | 11 ft | 2 ft | 7:59 | 9:06 | 10:15 |
| 17 | 0 ft | 13 ft | 7:51 | 8:59 | 10:06 |
| 18 | 11 ft | 18 ft | 7:52 | 9:00 | 10:07 |
| 19 | 35 ft | 0 ft | 8:11 | 9:21 | 10:32 |
| 20 | 50 ft | 0 ft | 8:19 | 9:30 | 10:41 |
| 21 | 133 ft | 0 ft | 9:03 | 10:20 | 11:38 |
| 22 | 6 ft | 93 ft | 7:35 | 8:40 | 9:45 |
| 23 | 51 ft | 85 ft | 7:46 | 8:53 | 9:59 |
| 24 | 24 ft | 71 ft | 7:43 | 8:50 | 9:56 |
| 25 | 69 ft | 60 ft | 7:58 | 9:06 | 10:15 |
| 26 | 4 ft | 75 ft | 7:38 | 8:44 | 9:49 |
| Last 0.2 | 1 ft | 6 ft | 1:45 | 1:59 | 2:14 |
Explore the Antelope Island Marathon course with the weather and your pace along the route, or compare it with other races.
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About the Antelope Island Marathon
The Antelope Island Marathon, once called the Layton Marathon, is held annually on Antelope Island in the Great Salt Lake, Utah. The course starts and finishes near the Antelope Island Marina, with runners traversing paved roads that feature rolling hills and stunning vistas of the lake and the island's mountainous terrain. Keep an eye out for bison, as the island hosts about 600 of them, adding a wild touch to this challenging run.
