West Yellowstone, United States of America · Saturday 9 May 2026
Set just outside Yellowstone National Park, this half marathon is an absolute dream for trail runners and nature lovers alike. The course meanders through forests, open meadows, and rugged terrain, offering panoramic views of the Rocky Mountains. Runners should be prepared for altitude challenges, as the race takes place at over 6,000 feet, making every mile a test of endurance.\n\nDespite the difficulty, the stunning surroundings—complete with steaming geysers, crystal-clear rivers, and wildlif
Adjusted Time
1:44:06
Time difference: -0.9 minutes compared to a flat, road, temperate course.
Yellowstone Half Marathon is a half marathon held in West Yellowstone, United States of America, scheduled for Saturday 9 May 2026. The course is run on road surface with 190m of total elevation gain, reaching a maximum altitude of 2119m above sea level. For registration and full race details, visit the official Yellowstone Half Marathon website.
With 190m of elevation gain, this is a moderately undulating course. The route ranges from 2019m to 2119m above sea level (100m total range). While not completely flat, the elevation changes are manageable for most runners and shouldn't significantly impact pacing strategy.
Based on historical weather data for May, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 1°C to 15°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a low chance of rain (2%), so dry conditions are likely.
Yellowstone Half 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 Yellowstone Half 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 half 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 Yellowstone Half Marathon against other half marathons to find the right race for your goals.
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