LoamLoam App StoreGoogle Play

Chino Hills State Park

Mountain bike trail conditions · Orange County & Inland Empire, CA 33.920° N  117.715° W   1,047 FT Verified

STAY OFF: Active damage risk

Thursday, October 22nd at 6pm Dries back to Caution.

Recent rain
0.7″ of rain, 1h ago
Today
65°Frain
  • Mon 10/12, no measurable rain, daily high 64 degrees Fahrenheit, modeled conditions: DRY
  • Tue 10/13, no measurable rain, daily high 72 degrees Fahrenheit, modeled conditions: DRY
  • Wed 10/14, no measurable rain, daily high 81 degrees Fahrenheit, modeled conditions: DRY
  • Thu 10/15, no measurable rain, daily high 87 degrees Fahrenheit, modeled conditions: DRY
  • Fri 10/16, no measurable rain, daily high 91 degrees Fahrenheit, modeled conditions: DRY then DUSTY
  • Sat 10/17, no measurable rain, daily high 86 degrees Fahrenheit, modeled conditions: DUSTY
  • Sun 10/18, no measurable rain, daily high 85 degrees Fahrenheit, modeled conditions: DUSTY
  • Mon 10/19, no measurable rain, daily high 83 degrees Fahrenheit, modeled conditions: DUSTY
  • Tue 10/20, no measurable rain, daily high 82 degrees Fahrenheit, modeled conditions: DUSTY
  • Wed 10/21, 0.39 inches of rain, daily high 74 degrees Fahrenheit, modeled conditions: DUSTY then CAUTION then STAY OFF
  • Today, Thu 10/22, 0.28 inches of rain, daily high 65 degrees Fahrenheit, modeled conditions: STAY OFF then CAUTION then STAY OFF then CAUTION
  • Fri 10/23, no measurable rain, daily high 69 degrees Fahrenheit, modeled conditions: CAUTION then DRY
  • Sat 10/24, no measurable rain, daily high 76 degrees Fahrenheit, modeled conditions: DRY
  • Sun 10/25, no measurable rain, daily high 80 degrees Fahrenheit, modeled conditions: DRY
  • Mon 10/26, no measurable rain, daily high 84 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
  • Tue 10/27, no measurable rain, daily high 81 degrees Fahrenheit, modeled conditions: DRY, forecast preview, beyond the free window
Updated

Updated Thursday, October 22nd, 2026 at 20:22 UTC. Verdict last changed: Thursday, October 22nd. Official closures and current trail conditions take priority.

Modeled hourly. Closures and local conditions take priority.

Watch Chino Hills State Park for free

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

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

Already have Loam? Open this trail

Download on the App StoreGet it on Google Play

Is Chino Hills State Park rideable today?

Not right now. The live verdict is STAY OFF: the ground is wet enough that riding would damage the trail. 0.7″ of rain, 1h ago.

CHANGED
Thursday, October 22nd at 11am
Rain moved in. Verdict dropped to STAY OFF.
Thursday, October 22nd at 7am
Dried back to CAUTION.
Wednesday, October 21st at 6pm
Rain moved in. Verdict dropped to STAY OFF.
Over the tracked history, Chino Hills State Park has been rideable on 9 of the last 10 days (very dry and dusty on 6 of them), and too wet to ride on 1. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Chino Hills State Park

Chino Hills State Park is a mountain bike trail network in Orange County & Inland Empire, CA. Soil data at the sampled location is classified as clay. Open tree cover can allow more sun and wind exposure, helping drying. Terrain data indicates an elevation of about 1,047 ft, an average terrain slope of 4.4° and a predominant ENE-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

SoilClay

Clay can retain moisture and become slick when wet. Wait for a firm trail surface and respect posted closures. The model uses surveyed water-retention values, not measured trail recovery times.

CanopyOpen 0%

Open tree cover can allow more sunlight and wind to reach the ground. Terrain, weather and trail construction also affect drying.

TerrainModerate

Moderate terrain slope is one input to the drying model. Local drainage also depends on soil and trail construction.

FAQ

Can you ride Chino Hills State Park right now?

The current estimate for Chino Hills State Park is STAY OFF: active damage risk. Expected rideable in ~11 hours. No significant rain before then. 0.7″ of rain, 1h ago.

Is Chino Hills State Park muddy right now?

Likely. The current estimate is STAY OFF: the ground is wet enough that riding could leave ruts. Clay can retain moisture, but soil type alone does not establish drying time. 0.7″ of rain, 1h ago.

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

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

How long does Chino Hills State Park take to dry after rain?

Chino Hills State Park has no fixed drying time. Rainfall, soil moisture, shade and the weather that follows all matter. Check the current estimate and wait until the trail surface is firm.

Can you ride Chino Hills State Park after rain?

Clay soil needs time to dry. Riding it wet can leave lasting ruts. Wait until the surface is firm. Check the current estimate before heading out, and turn back if your tires leave ruts.

What does a frozen condition mean at Chino Hills 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 Chino Hills State Park?

Terrain data indicates an elevation of about 1,047 ft, an average terrain slope of 4.4° and a predominant ENE-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
Claydrainage input
Terrain
Moderateterrain slope
Tree cover
0%Open
Elevation
1,047 ft
Average grade
4.4°
Predominant aspect
ENE-facing

Around Chino Hills State Park

Nearby networks

Bonelli Regional Park12 MI Fullerton Loop13 MI Claremont Hills Wilderness Park15 MI Crystal Cove State Park24 MI Aliso & Wood Canyons25 MI

Every Orange County & Inland Empire network →

Trail stewards

Trail work here is done by Friends of Chino Hills State Park. Support your local builders.