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Big Marsh Bike Park

Mountain bike trail conditions · Chicago, IL 41.687° N  87.571° W   591 FT Verified

PRIME: Rideable now

No significant rain in the forecast.

Recent rain
No measurable rain in the past week
Today
84°Fpartly cloudy
Last 10 daysoldest to newest

Updated Aug 26, 2026, 19:03 UTC. Modeled hourly. Official closures and current trail conditions take priority.

Is Big Marsh Bike Park rideable today?

Yes. The live verdict is PRIME, rideable now. No measurable rain in the past week.

Trail outlook

0.1″
FORECAST
STAY OFF 7d 2026-08-19: 0.00 inches of rain, representative trail outlook STAY OFF
STAY OFF 6d 2026-08-20: 0.00 inches of rain, representative trail outlook STAY OFF
STAY OFF 5d 2026-08-21: 0.00 inches of rain, representative trail outlook STAY OFF
CAUTION 4d 2026-08-22: 0.00 inches of rain, representative trail outlook CAUTION
PRIME 3d 2026-08-23: 0.00 inches of rain, representative trail outlook PRIME
PRIME 2d 2026-08-24: 0.00 inches of rain, representative trail outlook PRIME
PRIME 1d 2026-08-25: 0.00 inches of rain, representative trail outlook PRIME
84° PRIME Today 2026-08-26: 0.00 inches of rain, Partly cloudy, representative trail outlook PRIME
76° PRIME THU 2026-08-27: 0.00 inches of forecast rain, Cloudy, representative trail outlook PRIME
86° PRIME FRI 2026-08-28: 0.00 inches of forecast rain, Cloudy, representative trail outlook PRIME
80° PRIME SAT 2026-08-29: 0.00 inches of forecast rain, Cloudy, representative trail outlook PRIME
89° PRIME SUN 2026-08-30: 0.10 inches of forecast rain, Light rain, representative trail outlook PRIME
Measured rain Forecast rain Above soft threshold (0.5″)
Over the tracked history, Big Marsh Bike Park has been rideable on 4 of the last 10 days, under a caution advisory on 1, and too wet to ride on 5. Daily trail markers are representative daytime outlooks. Weather is one input. The rideability verdict also accounts for soil, terrain, canopy, and drying time.

Why Big Marsh Bike Park dries this way

Big Marsh Bike Park is a mountain bike network in the Chicago region of IL, riding on loam soil that drains well over terrain that holds water and dries slowly. What really sets the timing here is how quickly that ground gives back a firm, dry surface, not what the day’s forecast says. The N-facing aspect keeps the dirt shaded for much of the day, so moisture lingers after rain and snow is slow to clear, and the gentle terrain, about a 2.6° average grade at 591 ft, drains slowly enough that low spots stay soft after a storm.

Network profile

Soil
Loamdrains well · modeled
Drainage
Holds waterdries slowly
Tree cover
25%Partial
Elevation
591 ft
Average grade
2.6°
Predominant aspect
N-facing
How these factors affect drying

SoilLoam

Loam balances drainage with water retention, so it typically takes a day or two to dry after meaningful rain. The soil type here is classified, but the exact drying speed is modeled from that classification rather than measured directly at this spot.

CanopyPartial 25%

A mix of sun and shade. Conditions vary across the network, with open sections drying faster than covered ones.

TerrainHolds water

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

Around Big Marsh Bike Park

FAQ

Can you ride Big Marsh Bike Park right now?

As of the latest update, Big Marsh Bike Park is Rideable now (PRIME). No significant rain in the forecast. No measurable rain in the past week.

Is Big Marsh Bike Park muddy right now?

No. The current verdict is PRIME, which means the model reads the surface as dry. No measurable rain in the past week.

What is the soil and trail surface like at Big Marsh Bike Park?

Big Marsh Bike Park sits on loam soil that drains well. Loam balances drainage with water retention, so it typically takes a day or two to dry after meaningful rain. The soil type here is classified, but the exact drying speed is modeled from that classification rather than measured directly at this spot.

How long does Big Marsh Bike Park take to dry after rain?

Big Marsh Bike Park usually needs about a day or two to dry after meaningful rain. Its terrain holds water in low spots, which slows it.

Can you ride Big Marsh Bike Park after rain?

Usually yes, once the surface has had time to firm up, typically a day or two after meaningful rain. Rather than counting days, check the live verdict above: it already accounts for how much rain actually fell here and how fast this exact ground, with its slope and tree cover, gives back a firm, dry surface.

Does Big Marsh Bike Park get snow in winter?

Rarely. Big Marsh Bike Park sits low and mild enough (around 591 ft) that snow seldom affects riding; conditions are driven by rain and drying. Loam still flags FROZEN on the rare freeze.

What's the terrain and elevation like at Big Marsh Bike Park?

Big Marsh Bike Park sits at roughly 591 feet, faces mostly N, and averages a 2.6° grade with about 25% tree cover. That makes it a shady network that holds moisture longer than sunnier neighbors, and the gentle grade means it leaves low spots soft after storms. Loam models this exact ground against live weather rather than using one regional forecast.

When is the best time of year to ride Big Marsh Bike Park?

There is no real off-season at Big Marsh Bike Park: snow rarely interferes, so good days come down to rain and how fast the dirt dries. Its shady aspect means it needs longer after storms than sunnier networks nearby. The live verdict above reflects today.

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