Idaho Running Day Marathon

Boise, United States of America · Saturday 17 October 2026

RoadFull Marathon

The Idaho Running Day Marathon in Boise takes place in October 2026 on a completely flat road course, making it an excellent choice if you want to focus on pace and time rather than battling elevation. The 42.2-kilometer route won't demand the fitness reserves that a hilly course requires, so you can push harder if a personal record is your goal. Boise's autumn weather in October typically offers favorable running conditions with cooler temperatures that help manage effort and recovery. This is a straightforward road marathon that removes one major variable from race day, letting you concentrate on execution and effort. Check the race website closer to 2026 for details on course support, field size, and start time, as these details shape the actual experience significantly.

Difficulty Calculator

Your Marathon Time

Adjusted Time

3:52:32

Easy

Time difference: -7.5 minutes compared to a flat, road, temperate course.

Course Details

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How hard is Idaho Running Day Marathon?

We don't yet have verified elevation data for this course, so we can't rate its difficulty against other marathons. Our data pipeline backfills course elevation continuously - check back soon.