
Burlington, United States of America · Sunday 13 September 2026
Set in Burlington, Washington in September 2026, the Skagit Flats Marathon delivers exactly what its name promises: a genuinely flat course that sits just above sea level with virtually no meaningful elevation to fight. This is a road marathon built for runners chasing a fast time or those who want to conserve energy for a strong finish, since the gently rolling terrain means you won't spend the second half battling steep climbs. The 42.2-kilometer loop stays true to the Pacific Northwest lowlands, which typically means cool weather and potentially damp conditions by late summer, so prepare accordingly for the seasonal climate. If you're targeting a personal best or need a confidence-building race on forgiving terrain, this one checks the box without the pretense.
Adjusted Time
3:53:39
Time difference: -6.4 minutes compared to a flat, road, temperate course.
Skagit Flats Marathon is a full marathon held in Burlington, United States of America, scheduled for Sunday 13 September 2026. The course is run on road surface with 28m of total elevation gain, reaching a maximum altitude of 11m above sea level.
This is a very flat course with only 28m of total elevation gain across the full distance. The course ranges from 1m to 11m above sea level — a 10m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.
Skagit Flats Marathon is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.
Our difficulty rating for Skagit Flats Marathon is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
Looking for an easier marathon or a tougher challenge? You can also compare Skagit Flats Marathon against other marathons to find the right race for your goals.
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