St. Luke's Delaware & Lehigh (D&L) Heritage Marathon
St. Luke's Delaware & Lehigh (D&L) Heritage Marathon race day weather
Cool morning, steady wind
Runners will face a cool start at 33°F, rising to 49°F by race end. Winds from the NW at 13 mph will create a headwind throughout, with gusts up to 30 mph. With humidity at 69% and a dew point of 33°F, maintaining hydration and pacing conservatively early on is essential.
The finish is 15 miles from the start, so we forecast it at 2 points, not just the start line. At 9:00/mi, you start at 36° and finish around 11:25 AM in 45°.
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St. Luke's Delaware & Lehigh (D&L) Heritage Marathon route and elevation
The St. Luke's Delaware & Lehigh (D&L) Heritage Marathon course has about 260 ft (79 m) of climbing and 439 ft (134 m) of descent, a net drop of about 179 ft (55 m). It drops more than it climbs, and its terrain is faster than 91% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. The hardest mile is mile 9, with 67 ft (20 m) of climbing.
Biggest climbs
- Miles 8.6 to 8.7: climbs about 55 ft (17 m).
What the hills cost
- 3:30 on a flat course is about 3:29:35 here (25 seconds faster).
- 4:00 on a flat course is about 3:59:30 here (30 seconds faster).
- 4:30 on a flat course is about 4:29:30 here (30 seconds faster).
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 | 3 ft | 121 ft | 7:36 | 8:41 | 9:46 |
| 2 | 25 ft | 14 ft | 8:07 | 9:17 | 10:27 |
| 3 | 18 ft | 17 ft | 8:02 | 9:11 | 10:20 |
| 4 | 58 ft | 47 ft | 8:07 | 9:17 | 10:26 |
| 5 | 21 ft | 35 ft | 7:59 | 9:06 | 10:15 |
| 6 | 7 ft | 9 ft | 8:01 | 9:11 | 10:19 |
| 7 | 25 ft | 23 ft | 8:03 | 9:11 | 10:21 |
| 8 | 26 ft | 29 ft | 8:01 | 9:10 | 10:18 |
| 9 | 67 ft | 67 ft | 8:01 | 9:10 | 10:19 |
| 10 | 6 ft | 22 ft | 7:58 | 9:06 | 10:14 |
| 11 | 3 ft | 3 ft | 8:02 | 9:11 | 10:20 |
| 12 | 8 ft | 9 ft | 8:01 | 9:10 | 10:19 |
| 13 | 1 ft | 8 ft | 8:00 | 9:09 | 10:17 |
| 14 | 11 ft | 21 ft | 8:00 | 9:08 | 10:16 |
| 15 | 5 ft | 4 ft | 8:02 | 9:11 | 10:20 |
| 16 | 5 ft | 12 ft | 8:00 | 9:08 | 10:18 |
| 17 | 5 ft | 5 ft | 8:02 | 9:11 | 10:19 |
| 18 | 13 ft | 20 ft | 8:00 | 9:08 | 10:17 |
| 19 | 7 ft | 10 ft | 8:01 | 9:10 | 10:18 |
| 20 | 16 ft | 15 ft | 8:02 | 9:11 | 10:20 |
| 21 | 20 ft | 9 ft | 8:07 | 9:17 | 10:27 |
| 22 | 4 ft | 3 ft | 8:02 | 9:11 | 10:20 |
| 23 | 6 ft | 9 ft | 8:01 | 9:10 | 10:18 |
| 24 | 18 ft | 41 ft | 7:56 | 9:04 | 10:12 |
| 25 | 6 ft | 19 ft | 7:59 | 9:07 | 10:16 |
| 26 | 30 ft | 28 ft | 8:03 | 9:12 | 10:20 |
| Last 0.2 | 3 ft | 4 ft | 1:47 | 2:02 | 2:18 |
Explore the St. Luke's Delaware & Lehigh (D&L) Heritage Marathon course with the weather and your pace along the route, or compare it with other races.
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A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
About the St. Luke's Delaware & Lehigh (D&L) Heritage Marathon
Both the marathon and half marathon use the D&L Trail for a majority of their courses. The trail follows the Lehigh River for a gentle net elevation drop with fine gravel or pavement depending on the section. Participants can expect a beautiful trail, joint-friendly terrain, and crisp autumn temperatures. Source
