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September to November dates, the busiest window of the year.
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These come from what runners write about each race, not from an objective score. Each match shows how many experiences back it up.
How runners describe the feel of the weekend, taken from reports and reviews. Not something the race claims about itself.
How practical the race is to crew: course shape, what the driving is like and how long your runner is out of reach.
Best matches · 25 races
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Trail · 100 Mile · Multi-loop
Fountain Hills, AZ · Oct 31, 2026 · Waitlist only
Editorial summary
Javelina is not primarily difficult because of altitude or huge climbing. Desert heat and exposure can become the defining challenge, while the runnable terrain encourages aggressive early pacing.
Editorial summary
The entire race averages above 9,100 feet and combines 7,000 feet of gain with technical alpine footing.
Editorial summary
Moderate climbing for a mountain 100, but rocky technical sections and overnight running add difficulty.
Trail · Trail marathon · Out-and-back
Manitou Springs, CO · Typically September
Editorial summary
A 7,800-foot climb at roughly 11% average uphill grade followed by a technical high-altitude descent.
Editorial summary
Large cumulative climbing is compounded by prolonged running at high elevation. The trail is not uniformly technical, but altitude, long climbs, and potentially severe mountain weather substantially increase difficulty.
Editorial summary
Rolling city terrain requires restraint, though the downhill finish rewards good pacing.
Road · Marathon
Chicago, IL · Oct 10, 2027 · Registration opens soon
Road · Half marathon
Canmore, AB · Sep 12, 2027 · Registration opens soon
Editorial summary
Border logistics and bridge/tunnel transitions matter more than major elevation.
Editorial summary
The rocky early AT can damage legs before the very runnable towpath and road finish.
Editorial summary
Constant surface changes, technical slickrock/no-track sections and desert exposure.
Road · Marathon · Point-to-point
St. George, UT · Oct 2, 2027 · Dates not announced
Editorial summary
Large net descent can punish quads if the early downhill is overrun.