LoamLoam App StoreGoogle Play

Millersylvania State Park

Mountain bike trail conditions · Seattle & Snoqualmie, WA 46.914° N  122.915° W   210 FT Verified

CAUTION: Use judgment

Thursday, November 5th at 6am Dries back to Dry.

Recent rain
0.5″ of rain, 6d ago
Today
56°Fcloudy
  • Mon 10/26, 0.06 inches of rain, daily high 56 degrees Fahrenheit, modeled conditions: STAY OFF then CAUTION then DRY
  • Tue 10/27, no measurable rain, daily high 56 degrees Fahrenheit, modeled conditions: DRY
  • Wed 10/28, 0.10 inches of rain, daily high 53 degrees Fahrenheit, modeled conditions: DRY
  • Thu 10/29, no measurable rain, daily high 53 degrees Fahrenheit, modeled conditions: DRY
  • Fri 10/30, 0.48 inches of rain, daily high 52 degrees Fahrenheit, modeled conditions: DRY then STAY OFF then CAUTION then STAY OFF
  • Sat 10/31, no measurable rain, daily high 51 degrees Fahrenheit, modeled conditions: STAY OFF then CAUTION then DRY
  • Sun 11/1, no measurable rain, daily high 50 degrees Fahrenheit, modeled conditions: DRY
  • Mon 11/2, no measurable rain, daily high 49 degrees Fahrenheit, modeled conditions: DRY
  • Tue 11/3, no measurable rain, daily high 59 degrees Fahrenheit, modeled conditions: DRY
  • Wed 11/4, no measurable rain, daily high 57 degrees Fahrenheit, modeled conditions: DRY
  • Today, Thu 11/5, no measurable rain, daily high 56 degrees Fahrenheit, modeled conditions: DRY then CAUTION then DRY
  • Fri 11/6, 0.41 inches of rain, daily high 54 degrees Fahrenheit, modeled conditions: DRY then STAY OFF
  • Sat 11/7, 0.21 inches of rain, daily high 62 degrees Fahrenheit, modeled conditions: STAY OFF then CAUTION then DRY then STAY OFF
  • Sun 11/8, 0.14 inches of rain, daily high 55 degrees Fahrenheit, modeled conditions: STAY OFF then CAUTION then DRY
  • Mon 11/9, no measurable rain, daily high 56 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
  • Tue 11/10, no measurable rain, daily high 60 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
Updated

Updated Thursday, November 5th, 2026 at 12:47 UTC. Verdict last changed: Thursday, November 5th. Official closures and current trail conditions take priority.

Modeled hourly. Closures and local conditions take priority.

Watch Millersylvania State Park for free

Download Loam for free and get trail-condition alerts. No account needed.

After installing, search for Millersylvania State Park and turn on alerts.

Already have Loam? Open this trail

Download on the App StoreGet it on Google Play

Is Millersylvania State Park rideable today?

Rideable with judgment. The live verdict is CAUTION: the model reads the surface as marginal. 0.5″ of rain, 6d ago.

CHANGED
Saturday, October 31st at 2pm
Dried back to DRY.
Saturday, October 31st at 8am
Dried back to CAUTION.
Friday, October 30th at 6am
Rain moved in. Verdict dropped to CAUTION.
Over the tracked history, Millersylvania State Park has been rideable on 6 of the last 10 days, under a caution advisory on 3, and too wet to ride on 1. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Millersylvania State Park

Millersylvania State Park is a mountain bike trail network in Seattle & Snoqualmie, WA. Soil data at the sampled location is classified as organic soil. Dense tree cover can reduce sun and wind exposure, slowing drying. Terrain data indicates an elevation of about 210 ft, an average terrain slope of 1.5° and a predominant SSE-facing aspect. Terrain slope does not measure the trail tread or its drainage features. Loam models conditions across the network; individual trails and constructed surfaces can differ from these environmental inputs. Official closures and conditions on the ground take priority.

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 71%

Dense tree cover can reduce sunlight and wind at ground level, slowing drying. Its effect depends on weather and local openings.

TerrainGentle

Gentle terrain can allow water to linger, but slope alone does not establish whether water pools on a trail.

FAQ

Can you ride Millersylvania State Park right now?

The current estimate for Millersylvania State Park is CAUTION: use judgment. Recent rain not yet modeled. Local radar saw rain the forecast missed. Conditions may be wetter than shown. 0.5″ of rain, 6d ago.

Is Millersylvania State Park muddy right now?

Possibly in places. The current estimate is CAUTION. Watch for soft sections, especially in low or shaded areas. 0.5″ of rain, 6d ago.

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

The soil data at the sampled location is classified as organic soil. This describes an environmental input, not a survey of every trail surface.

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

Millersylvania State Park has organic soil with no fixed drying time; check the live verdict for the current estimate.

Can you ride Millersylvania 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.

What does a frozen condition mean at Millersylvania State Park?

FROZEN means Loam estimates snow cover or frozen ground. It does not establish that riding is allowed or that every trail is frozen. Check posted winter access rules and watch for soft ground as temperatures rise.

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

Terrain data indicates an elevation of about 210 ft, an average terrain slope of 1.5° and a predominant SSE-facing aspect. Terrain slope does not measure the trail tread or its drainage features.

Trail stewards, clubs and bike shops: Put live conditions on your site with a free badge that updates itself. Get the embed code →
Appearance

Loam is a rider app. The badge helps riders find it, so standard embeds are free. No account required. The snippet includes a short text link to the live conditions page; please keep it so riders can open full details. Need several networks? Build a free trail conditions widget. How Loam works and why it is free.

Network profile

Network profile

Soil
Organic soilsurveyed retention
Terrain
Gentleterrain slope
Tree cover
71%Dense
Elevation
210 ft
Average grade
1.5°
Predominant aspect
SSE-facing

Around Millersylvania State Park

Nearby networks

Capitol Forest13 MI North Slope16 MI Swan Creek Park32 MI 360 Park35 MI Dash Point State Park37 MI

Every Seattle & Snoqualmie network →