Jack and Jill's Downhill Marathon

Jack and Jill's Downhill Marathon 2025 Course Analysis

Jack and Jill's Downhill Marathon is a full marathon held in Snoqualmie, United States, scheduled for Sunday 27 July 2025. The course is run on trail surface with 115m of total elevation gain, reaching a maximum altitude of 787m above sea level. For registration and full race details, visit the official Jack and Jill's Downhill Marathon website.

Elevation Profile

With 115m of elevation gain, this is a moderately undulating course. The route ranges from 165m to 787m above sea level (622m total range). While not completely flat, the elevation changes are manageable for most runners and shouldn't significantly impact pacing strategy.

Surface Type: Trail

Jack and Jill's Downhill Marathon is a trail race, meaning the course includes unpaved surfaces such as dirt, gravel, or forest paths. Trail surfaces are inherently slower than road courses due to uneven footing, technical sections, and often steeper gradients. Trail-specific shoes with good grip are recommended, and runners should expect a finish time 10-20% slower than their equivalent road marathon time.

How Difficult Is Jack and Jill's Downhill Marathon?

Our difficulty rating for Jack and Jill's Downhill 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 Jack and Jill's Downhill Marathon against other marathons to find the right race for your goals.