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Big Sky Marathon

Big Sky Marathon

Big Sky, United States of America · Monday 12 July 2027

Official WebsiteRoadFull Marathon

The Big Sky Marathon is a road and trail marathon event that began in 2015 near Ennis, Montana, designed to meet the demand for a back-to-back marathon challenge in Montana, often drawing participants immediately after the Madison Marathon held the previous day. The event was created to appeal to running enthusiasts who seek extreme challenges and the opportunity to complete two marathons in a single weekend, a concept especially popular among members of running groups like the Marathon Maniacs.

Difficulty Calculator

h
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m
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s

Adjusted Time

4:07:00

Difficult

Time difference: +7.0 minutes compared to a flat, road, temperate course.

Course Details

Elevation Gain208m
Elevation High2600m
Elevation Low1569m

Weather Forecast

High32°C
Low16°C
Chance of Rain3%

How hard is Big Sky Marathon?

Very Difficultharder than 74% of marathons
Flattest / easiestHardest

On our difficulty model, Big Sky Marathon plays about 18 minutes slower than an average road marathon for a 3:30 runner. It ranks #302 hardest of 1151 marathons we analyse, and #172 of 576 in United States of America. Use the calculator above to see the exact adjusted time for your own goal pace.

What will you run at Big Sky Marathon?

Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.

Average-course timeOn Big Sky MarathonDifference
3:00:003:01:55+01:55
3:30:003:34:15+04:15
4:00:004:07:00+07:00
4:30:004:40:09+10:09
5:00:005:13:39+13:39
5:30:005:47:29+17:29
6:00:006:21:36+21:36

Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.

Big Sky Marathon 2027 Course Analysis

Big Sky Marathon is a full marathon held in Big Sky, United States of America. It is scheduled for Monday 12 July 2027. The course is run on road surface with 208m of total climbing and around 1234m of descent (a net drop of roughly 1026m), with its high point near 2600m above sea level. For registration and full race details, visit the official Big Sky Marathon website.

Elevation Profile

This is a net-downhill course: it descends roughly 1026m more than it climbs (208m of ascent against about 1234m of descent), dropping from a high point near 2600m toward 1569m above sea level. Point-to-point downhill courses like this are among the fastest available for a personal best or a Boston qualifier - just be aware that sustained descending fatigues the quads late in the race, so ease off early and do some downhill running in training.

Expected Race Day Weather

Based on historical weather data for July, the expected race day conditions are as follows. Hot conditions are expected, with temperatures between 16°C and 32°C. Heat is one of the biggest performance factors in distance running - for every degree above 15°C, finish times can slow by roughly 1-2%. Extra hydration and a conservative start are strongly recommended. There is a low chance of rain (3%), so dry conditions are likely.

Surface Type: Road

Big Sky Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.

Looking for an easier marathon or a tougher challenge? You can also compare Big Sky Marathon against other marathons to find the right race for your goals.

Marathons of similar difficulty

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Rimini-Verucchio

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Utah Valley Marathon

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