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Idaho Falls Marathon

Idaho Falls Marathon

Idaho Falls Marathon offers a flat, fast course with a growing field and strong community spirit.

Race Date

Jul 25, 2026

Location

Idaho Falls, ID

Standout70

Quick facts

Date
Saturday, July 25, 2026
Location
Idaho Falls, Idaho
Distance
Half marathon (13.1 mi) + 26.2M, 5K run
Course
Loop Course
Terrain
Road
USATF certified
Not listed
Finishers on record
2,560

Highlights

Good For

PR FriendlyDestination Worthy

Atmosphere

Spectator SupportWell Organized

Course

Fast Flat

The Experience

The Idaho Falls Marathon and Half Marathon, first run in 2012 and now in its 13th year, has become a beloved fixture in the Gem State. This event is known for its exceptionally flat and fast certified course, making it a prime destination for runners chasing personal bests. The race typically sees around 277 finishers, drawing participants from approximately 28 states, testament to its growing reputation.

Runners often praise the welcoming atmosphere and the dedicated community support that lines the course. While the repeat-runner rate hovers around 13%, the growing field suggests an increasing number of athletes are discovering the appeal of this Idaho race. The event offers a full marathon and a 5K alongside the half marathon, catering to a range of abilities.

The finish line celebration is a highlight, with participants enjoying a well-earned sense of accomplishment. The race is organized with attention to detail, ensuring a smooth experience for all involved, from seasoned marathoners to those tackling their first half.

Race-provided description

Welcome to the Idaho Falls Marathon. Learn all about the annual races and access registration for the next race.

Logistics

Race Day

Saturday, July 25, 2026

Start Time

TBA

Start Location

Idaho Falls, ID

Directions

Course Info

Course Type

Loop Course

Terrain

road

Surface

Paved

Difficulty

Ultra-Flat

Net Drop/km

0 m (Flat)

Separation

0.0%

Also Offers

26.2M5K run

Quality Score

Standout70
Methodology
Heritage20/20

13 years running

Size12/15

~215 finishers a year

Momentum5/5

growing or steady

Loyalty13/20

13% returning runners

Course & details6/15

2 timing sources · 4 photos

National draw9/10

runners from 28 states

Front-pack speed5/5

winner 1:10:25

Weather0/10

typical high 93°F

Race Day Weather

5-year historical avg

Start (Low)

63°

Afternoon (High)

93°

Hot conditions — adjust pace expectations, prioritize hydration

0.0"

Precipitation

13 mph

Wind

24%

Humidity

Historical Finish Times

How 2,560 finishers actually crossed the line across 13 years.

Most recent

2025

Total finishers

2,560

Median time

2:16:00

Latest turnout

277

States

44

10%
25%
75%
90%
1:05p50 median ≈ 2:106:25

Turnout by year

20172025

'17'18'19'21'22'23'24'25
See full results

Hover the histogram to inspect specific finish times.

Race Photos

Frequently asked

When is the Idaho Falls Marathon?

The Idaho Falls Marathon is held on Saturday, July 25, 2026.

Where does the Idaho Falls Marathon take place?

It takes place in Idaho Falls, Idaho.

What distances does the Idaho Falls Marathon offer?

The half marathon (13.1 miles), plus 26.2M, 5K run.

Is the Idaho Falls Marathon course flat and good for a PR?

The Idaho Falls Marathon is a ultra-flat, loop course course.

How many people run the Idaho Falls Marathon?

HalfRuns has finish records for 2,560 runners who have completed the Idaho Falls Marathon.

HalfRuns editorial — independent, no paid placement.

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