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Fullerton Loop

Mountain bike trail conditions · Orange County & Inland Empire, CA 33.882° N  117.929° W   249 FT Verified

PRIME: Rideable now

No significant rain in the forecast.

Recent rain
0.6″ of rain, 6d ago
Today
87°Fcloudy

Updated Sep 12, 2026, 16:30 UTC. Modeled hourly. Verdict last changed: Sep 7. Official closures and current trail conditions take priority.

Last 10 daysoldest to newest

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Trail outlook

Is Fullerton Loop rideable today?

Yes. The live verdict is PRIME, rideable now. 0.6″ of rain, 6d ago.

0.6″
FORECAST
PRIME 7d 2026-09-05: 0.00 inches of rain, representative trail outlook PRIME
CAUTION 6d 2026-09-06: 0.60 inches of rain, representative trail outlook CAUTION
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
87° PRIME Today 2026-09-12: 0.00 inches of rain, Cloudy, representative trail outlook PRIME
85° PRIME SUN 2026-09-13: 0.00 inches of forecast rain, Partly cloudy, representative trail outlook PRIME
87° PRIME MON 2026-09-14: 0.00 inches of forecast rain, Clear, representative trail outlook PRIME
85° PRIME TUE 2026-09-15: 0.00 inches of forecast rain, Clear, representative trail outlook PRIME
86° PRIME WED 2026-09-16: 0.00 inches of forecast rain, Clear, representative trail outlook PRIME
Modeled rain Forecast rain Above soft threshold (0.5″)
Over the tracked history, Fullerton Loop has been rideable on 9 of the last 10 days, and under a caution advisory on 1. Each daily marker shows the expected daytime condition. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Fullerton Loop

Fullerton Loop is a mountain bike trail network in Orange County & Inland Empire, CA. The soil is sandy and drains fast. With little tree cover, the ground gets plenty of sun and wind. The terrain averages a 1° slope at 249 ft and mainly faces SE. Its nearly flat slopes can hold water in flat stretches.

How these factors affect drying

SoilSandy

Sandy, coarse soil sheds water fast. These trails are among the quickest to recover after rain.

CanopyOpen 22%

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 Fullerton Loop right now?

The current estimate for Fullerton Loop is PRIME: rideable now. No significant rain in the forecast. 0.6″ of rain, 6d ago.

Is Fullerton Loop muddy right now?

Loam currently estimates dry conditions (PRIME). Sandy soil usually drains quickly. 0.6″ of rain, 6d ago.

What is the soil and trail surface like at Fullerton Loop?

Fullerton Loop sits on sandy soil that drains fast. Sandy, coarse soil sheds water fast. These trails are among the quickest to recover after rain.

How long does Fullerton Loop take to dry after rain?

Fullerton Loop usually needs only a few hours to recover after light rain. Its terrain holds water in low spots, which slows it.

Can you ride Fullerton Loop after rain?

Sandy soil drains quickly, though heavier rain can leave soft spots. Wait until the surface is firm. Check the current estimate before heading out, and turn back if your tires leave ruts.

Does Fullerton Loop get snow in winter?

Rarely. Fullerton Loop sits low and mild enough (around 249 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 Fullerton Loop?

Fullerton Loop sits at roughly 249 feet, faces mostly SE, and averages a 1° grade with about 22% tree cover. It is quicker to dry where it faces south, and the nearly flat terrain holds puddles in the flats.

When is the best time of year to ride Fullerton Loop?

Snow rarely affects Fullerton Loop. Check recent rain and allow time for the ground to dry. Its sunny aspect helps it come back fast after storms. The live verdict above reflects today.

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Network profile

Network profile

Soil
Sandydrains fast
Drainage
Holds waterdries slowly
Tree cover
22%Open
Elevation
249 ft
Average grade
Predominant aspect
SE-facing

Around Fullerton Loop