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Tillamook State Forest

Mountain bike trail conditions · Portland & the Gorge, OR 45.701° N  123.342° W   1,316 FT Verified

PRIME: Rideable now

Thu 24 Conditions turn Caution.

Recent rain
0.2″ of rain, 7d ago
Today
74°Fclear
  • Thu 9/10, no measurable rain, modeled conditions: PRIME
  • Fri 9/11, no measurable rain, modeled conditions: PRIME
  • Sat 9/12, 0.22 inches of rain, modeled conditions: PRIME then CAUTION then PRIME
  • Sun 9/13, no measurable rain, modeled conditions: PRIME
  • Mon 9/14, no measurable rain, modeled conditions: PRIME
  • Tue 9/15, no measurable rain, modeled conditions: PRIME
  • Wed 9/16, no measurable rain, modeled conditions: PRIME
  • Thu 9/17, no measurable rain, modeled conditions: PRIME
  • Fri 9/18, no measurable rain, modeled conditions: PRIME
  • Sat 9/19, no measurable rain, modeled conditions: PRIME
  • Today, Sun 9/20, no measurable rain, modeled conditions: PRIME
  • Mon 9/21, no measurable rain, modeled conditions: PRIME
  • Tue 9/22, no measurable rain, modeled conditions: PRIME
  • Wed 9/23, no measurable rain, modeled conditions: PRIME
  • Thu 9/24, 0.42 inches of rain, modeled conditions: PRIME then CAUTION, forecast preview, beyond the free window
  • Fri 9/25, 0.13 inches of rain, modeled conditions: CAUTION then PRIME, forecast preview, beyond the free window

Updated Sep 20, 2026, 13:50 UTC. Modeled hourly. Unchanged for 10+ days. Official closures and current trail conditions take priority.

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Is Tillamook State Forest rideable today?

Yes. The live verdict is PRIME, rideable now. 0.2″ of rain, 7d ago.

CHANGED
Sun 135am
Dried back to PRIME.
Sun 1312am
Rain moved in. Verdict dropped to CAUTION.
Over the tracked history, Tillamook State Forest has been rideable on 10 of the last 10 days. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Tillamook State Forest

Tillamook State Forest is a mountain bike trail network in Portland & the Gorge, OR. The soil here is organic. Heavy tree cover can slow drying after rain. The terrain averages a 5.8° slope at 1,316 ft and mainly faces NNE. Its rolling slopes drain steadily.

How we check ourselves

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.

CanopyDense 86%

Heavy tree cover shades the soil and blocks wind, so these trails dry slowly and can hold morning damp even after dry days.

TerrainModerate

Terrain here drains at a moderate pace. It neither sheds nor holds water strongly.

FAQ

Can you ride Tillamook State Forest right now?

The current estimate for Tillamook State Forest is PRIME: rideable now. Rain returns in ~4 days. 0.2″ of rain, 7d ago.

Is Tillamook State Forest muddy right now?

Loam currently estimates dry conditions (PRIME). 0.2″ of rain, 7d ago.

What is the soil and trail surface like at Tillamook State Forest?

Tillamook State Forest 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 Tillamook State Forest take to dry after rain?

Tillamook State Forest has organic soil with no fixed drying time; check the live verdict for the current estimate. Its terrain drains at a moderate pace. Heavy tree cover slows drying further.

Can you ride Tillamook State Forest 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 Tillamook State Forest get snow in winter?

Occasionally. Cold snaps can bring snow or a hard freeze to Tillamook State Forest (around 1,316 ft), but it rarely lasts. Loam flags a FROZEN state when it happens and clears it once the trail thaws.

What's the terrain and elevation like at Tillamook State Forest?

Tillamook State Forest sits at roughly 1,316 feet, faces mostly NNE, and averages a 5.8° grade with about 86% tree cover. It is slower to dry where it faces north, and the rolling terrain drains steadily.

When is the best time of year to ride Tillamook State Forest?

Tillamook State Forest usually has little snow, though winter cold snaps can interrupt riding. Recent rain and drying time matter throughout the year. Its shady aspect means it needs longer after storms than sunnier networks nearby. Check the live verdict the morning you want to ride.

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Network profile

Network profile

Soil
Organic soilsurveyed retention
Drainage
Moderateeven drying
Tree cover
86%Dense
Elevation
1,316 ft
Average grade
5.8°
Predominant aspect
NNE-facing

Around Tillamook State Forest

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