Tunnel Light Marathon

Tunnel Light Marathon 2026 Course Analysis

Tunnel Light Marathon is a full marathon held in North Bend, United States of America. It is scheduled for Sunday 13 September 2026. The course is run on road surface with 81m of total climbing and around 347m of descent (a net drop of roughly 266m), with its high point near 786m above sea level. For registration and full race details, visit the official Tunnel Light Marathon website.

Elevation Profile

This is a net-downhill course: it descends roughly 266m more than it climbs (81m of ascent against about 347m of descent), dropping from a high point near 786m toward 517m above sea level. Point-to-point downhill courses like this are among the fastest available for a personal best or a Boston qualifier - just be aware that sustained descending fatigues the quads late in the race, so ease off early and do some downhill running in training.

Expected Race Day Weather

Based on historical weather data for September, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 13°C to 17°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a high chance of rain (76%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.

Surface Type: Road

Tunnel Light Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.

Looking for an easier marathon or a tougher challenge? You can also compare Tunnel Light Marathon against other marathons to find the right race for your goals.