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Harriman State Park

Mountain bike trail conditions · Idaho 44.331° N  111.462° W   6,142 FT Verified

DUSTY: Rideable, very dry

Expect dust and loose corners.

Recent rain
No measurable rain in the past week
Today
73°Fpartly cloudy

Updated Sep 13, 2026, 04:45 UTC. Modeled hourly. Verdict last changed: Sep 12. Official closures and current trail conditions take priority.

Last 10 daysoldest to newest

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Trail outlook

Is Harriman State Park rideable today?

Yes. The live verdict is DUSTY: rideable, but very dry and loose over hardpack. No measurable rain in the past week.

FORECAST
PRIME 7d 2026-09-05: 0.00 inches of rain, representative trail outlook PRIME
PRIME 6d 2026-09-06: 0.00 inches of rain, representative trail outlook PRIME
PRIME 5d 2026-09-07: 0.00 inches of rain, representative trail outlook PRIME
PRIME 4d 2026-09-08: 0.00 inches of rain, representative trail outlook PRIME
PRIME 3d 2026-09-09: 0.00 inches of rain, representative trail outlook PRIME
PRIME 2d 2026-09-10: 0.00 inches of rain, representative trail outlook PRIME
PRIME 1d 2026-09-11: 0.00 inches of rain, representative trail outlook PRIME
73° PRIME Today 2026-09-12: 0.00 inches of rain, Partly cloudy, representative trail outlook PRIME
70° PRIME SUN 2026-09-13: 0.00 inches of forecast rain, Cloudy, representative trail outlook PRIME
61° PRIME MON 2026-09-14: 0.00 inches of forecast rain, Partly cloudy, representative trail outlook PRIME
68° DUSTY TUE 2026-09-15: 0.00 inches of forecast rain, Cloudy, representative trail outlook DUSTY
71° DUSTY WED 2026-09-16: 0.00 inches of forecast rain, Cloudy, representative trail outlook DUSTY
No measurable rain in the window. Over the tracked history, Harriman State Park has been rideable on 10 of the last 10 days (very dry and dusty on 1 of them). Each daily marker shows the expected daytime condition. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Harriman State Park

Harriman State Park is a mountain bike trail network in Idaho. The soil here is organic. With little tree cover, the ground gets plenty of sun and wind. The terrain averages a 0.6° slope at 6,142 ft and mainly faces NE. Its nearly flat slopes can hold water in flat stretches.

How these factors affect drying

SoilOrganic soil

The soil survey describes organic material at this spot, not a mineral soil texture. The drying model uses surveyed water-retention values. Organic soils vary in how they drain, so this label alone does not tell you how quickly the trail will dry.

CanopyOpen 24%

Little tree cover means full sun and wind, so these trails are among the fastest to rebound after rain.

TerrainHolds water

Water tends to pool and linger here rather than running off, so the surface can stay damp well after the weather clears.

FAQ

Can you ride Harriman State Park right now?

The current estimate for Harriman State Park is DUSTY: rideable, very dry. Rideable, but very dry. Expect dust and loose corners. No measurable rain in the past week.

Is Harriman State Park muddy right now?

Loam currently estimates dry conditions (DUSTY). No measurable rain in the past week.

What is the soil and trail surface like at Harriman State Park?

Harriman State Park has organic soil. The soil survey describes organic material at this spot, not a mineral soil texture. The drying model uses surveyed water-retention values. Organic soils vary in how they drain, so this label alone does not tell you how quickly the trail will dry.

How long does Harriman State Park take to dry after rain?

Harriman State Park has organic soil with no fixed drying time; check the live verdict for the current estimate. Its terrain holds water in low spots, which slows it.

Can you ride Harriman State Park after rain?

Wait until the surface is firm and respect any posted closures. Organic soil alone does not tell you how soon that will be. Check the live verdict for the current drying estimate.

Does Harriman State Park get snow in winter?

Yes. At 6,142 ft, Harriman State Park typically sees winter snow and freeze-thaw that can pause riding. Loam flags a FROZEN state when the ground is snow-covered or frozen, then clears it as things thaw and dry.

What's the terrain and elevation like at Harriman State Park?

Harriman State Park sits at roughly 6,142 feet, faces mostly NE, and averages a 0.6° grade with about 24% tree cover. It is exposed to morning sun, and the nearly flat terrain holds puddles in the flats.

When is the best time of year to ride Harriman State Park?

Snow can limit riding at Harriman State Park in winter, at around 6,142 feet. Spring snowmelt and fall freezes can also affect conditions. Check the current conditions before planning a ride.

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Network profile

Network profile

Soil
Organic soilsurveyed retention
Drainage
Holds waterdries slowly
Tree cover
24%Open
Elevation
6,142 ft
Average grade
0.6°
Predominant aspect
NE-facing

Around Harriman State Park