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About RaceIndexOur methodologyData coverageCyclingTriathlon
  • Half Marathon
  • 21.1 km
  • Idaho Falls
  • Event weekend starts
  • Past event

Idaho Falls Marathon Half Marathon

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2026 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

Modelled energy-cost change 0.1% versus flat · net elevation -3 m

View verified GPS mapOfficial event website ↗
Plan my trainingPlan my paceData current as of

Decision summary

Idaho Falls Marathon Half Marathon at a glance

Route ascent
50 m

Lower than 93% of comparable mapped races

Cut-off average pace
14:13/km

5:00:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.

Typical conditions
43/100

Historical race-date favourability, not a forecast

Evidence depth
25 verified facts

Stored GPS route

Quick answers

What runners ask first

Idaho Falls Marathon Half Marathon route map

raceindex.org has a GPS course file for Idaho Falls Marathon Half Marathon, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.

How hilly is the Idaho Falls Marathon Half Marathon?

The Idaho Falls Marathon Half Marathon route has 50 m of ascent, 52 m of descent and an estimated 0.1% grade-adjusted pace penalty versus a flat route.

Where does the Idaho Falls Marathon Half Marathon route go?

The Idaho Falls Marathon Half Marathon route starts at Snake River Landing, 953 Pier View Dr, Idaho Falls, ID 83402 (start and finish for all distances) and finishes at Snake River Landing, Idaho Falls. Underfoot, expect a road course. It passes Snake River Landing and Snake River Greenbelt.

Race character

Scenery

  • Waterfront
  • Countryside
  • Riverside
  • City
  • Historic
  • Parkland

Atmosphere

  • Community
  • Charity

Terrain

  • Road
Elevation character
Flat

Entry, logistics and records

Entry requirements

Entry status
Past event: The listed edition date has passed.
Cut-off
5 hours (7:00 AM start, 12:00 PM cutoff)

Race day logistics

Medal
Finishers receive a medal at the finish line

Access and course status

Start
Snake River Landing, 953 Pier View Dr, Idaho Falls, ID 83402 (start and finish for all distances)
Finish
Snake River Landing, Idaho Falls

Course facts

Course type
Loop
Landmarks
Snake River Landing, Snake River Greenbelt
Notable features
  • Post-race party included for participants
  • aid stations every 3 miles stocked with water and GU energy gels
  • medical professionals on-site

How hilly is the Idaho Falls Marathon Half Marathon?

96%
  • Steep descent 0%
  • Descent 2%
  • Flat 96%
  • Climb 2%
  • Steep climb 0%
Total ascent
50 m
Net elevation
−3 m
GAP factor
0.1%
Longest climb
1,490 m at 0.7%
Gradient mix and ascent are derived from the course geometry under our published normalisation, not taken from organiser marketing.

What are typical race-day conditions?

  • 25°CTypical temperature
  • 18 kphTypical wind
  • 0 mmTypical rainfall
  • 43Favourability /100
Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

More race details

Is the Idaho Falls Marathon Half Marathon flat?

Its normalised GAP factor is 0.1% slower than a flat course, with about 50 m of total ascent.

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (3)

Read the full methodology →