St. Luke's Delaware & Lehigh (D&L) Heritage Marathon
Race Day Weather
Cool start, gradual warm-up
Runners will face a start-line temperature of 41°F, rising to a high of 54°F. A light wind from the SW at 7 mph, with occasional gusts, will be present. With humidity at 62%, runners should consider a conservative start and stay hydrated, especially as temperatures rise.
Get forecast alerts for St. Luke's Delaware & Lehigh (D&L) Heritage Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
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