The 2025 event has concluded.
Race Day Weather
46°
60° high
Light
Light rain likely
Cool conditions, light rain expected
Runners will face a steady temperature rise from 46°F to 60°F, with high humidity at 82%. Light rain will begin early, with 0.03 in/hr expected, and a gentle wind from the ESE at 8 mph. Hydration will be crucial, and runners should consider wearing gear that handles moisture well.
Pre-raceRace windowPost-race
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
FAQ
When is the 2025 St. Luke's Delaware & Lehigh (D&L) Heritage Marathon?
The 2025 St. Luke's Delaware & Lehigh (D&L) Heritage Marathon will be held on Sunday November 9, 2025.
Is the St. Luke's Delaware & Lehigh (D&L) Heritage Marathon a Boston Marathon Qualifier?
Yes, the St. Luke's Delaware & Lehigh (D&L) Heritage Marathon is an official Boston Marathon qualifier.
