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Alderfer/Three Sisters Park

Mountain bike trail conditions · Denver & Golden, CO 39.624° N  105.352° W   7,832 FT Verified

DRY: Rideable

No significant rain in the forecast.

Recent rain
0.2″ of rain, 3d ago
Today
49°Fcloudy
  • Mon 10/26, 0.24 inches of rain, daily high 50 degrees Fahrenheit, modeled conditions: CAUTION then DRY
  • Tue 10/27, no measurable rain, daily high 60 degrees Fahrenheit, modeled conditions: DRY
  • Wed 10/28, no measurable rain, daily high 60 degrees Fahrenheit, modeled conditions: DRY
  • Thu 10/29, no measurable rain, daily high 58 degrees Fahrenheit, modeled conditions: DRY
  • Fri 10/30, no measurable rain, daily high 62 degrees Fahrenheit, modeled conditions: DRY
  • Sat 10/31, no measurable rain, daily high 57 degrees Fahrenheit, modeled conditions: DRY
  • Sun 11/1, 0.13 inches of rain, daily high 61 degrees Fahrenheit, modeled conditions: DRY
  • Mon 11/2, 0.28 inches of rain, daily high 47 degrees Fahrenheit, modeled conditions: DRY then CAUTION then DRY
  • Tue 11/3, no measurable rain, daily high 49 degrees Fahrenheit, modeled conditions: DRY
  • Wed 11/4, no measurable rain, daily high 47 degrees Fahrenheit, modeled conditions: DRY
  • Today, Thu 11/5, no measurable rain, daily high 49 degrees Fahrenheit, modeled conditions: DRY
  • Fri 11/6, no measurable rain, daily high 48 degrees Fahrenheit, modeled conditions: DRY
  • Sat 11/7, no measurable rain, daily high 54 degrees Fahrenheit, modeled conditions: DRY
  • Sun 11/8, no measurable rain, daily high 63 degrees Fahrenheit, modeled conditions: DRY
  • Mon 11/9, no measurable rain, daily high 62 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 13:25 UTC. Verdict last changed: Thursday, November 5th. Official closures and current trail conditions take priority.

Modeled hourly. Closures and local conditions take priority.

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Is Alderfer/Three Sisters Park rideable today?

Yes. The live verdict is DRY, rideable now. 0.2″ of rain, 3d ago.

CHANGED
Monday, November 2nd at 4pm
Dried back to DRY.
Monday, November 2nd at 2pm
Rain moved in. Verdict dropped to CAUTION.
Monday, October 26th at 9am
Dried back to DRY.
Over the tracked history, Alderfer/Three Sisters Park has been rideable on 10 of the last 10 days. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Alderfer/Three Sisters Park

Alderfer/Three Sisters Park is a mountain bike trail network in Denver & Golden, CO. Soil data at the sampled location is classified as rocky sandy. Terrain data indicates an elevation of about 7,832 ft, an average terrain slope of 3.7° and a predominant ESE-facing aspect. Terrain slope does not measure the trail tread or its drainage features. Trails here include Ponderosa Trail. 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

SoilRocky sandy

The soil data includes about 55% rock fragments. The model uses this to adjust drainage; it does not measure how quickly every trail section dries. Drying behavior is modeled from the soil classification, not measured directly on the trail.

CanopyPartial 41%

Partial tree cover suggests a mix of sun and shade. Local exposure and surface conditions can vary across the network.

TerrainModerate

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

FAQ

Can you ride Alderfer/Three Sisters Park right now?

The current estimate for Alderfer/Three Sisters Park is DRY: rideable. Rideable now. No significant rain in the forecast. 0.2″ of rain, 3d ago.

Is Alderfer/Three Sisters Park muddy right now?

Loam currently estimates dry conditions (DRY). The drying model accounts for about 55% rock fragments in the soil data. 0.2″ of rain, 3d ago.

What is the soil and trail surface like at Alderfer/Three Sisters Park?

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

How long does Alderfer/Three Sisters Park take to dry after rain?

Alderfer/Three Sisters Park has no fixed drying time. Rainfall, soil moisture, shade and the weather that follows all matter. The model accounts for about 55% rock fragments in the soil data, but that does not establish a recovery time. Check the current estimate and wait until the trail surface is firm.

Can you ride Alderfer/Three Sisters Park after rain?

Rock fragments influence the drying model, but softer trail sections may need more time. 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 Alderfer/Three Sisters 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 trails are at Alderfer/Three Sisters Park?

Trails at Alderfer/Three Sisters Park include Mountain Muhly Trail, Dedisse, Ponderosa Trail, Sisters Trail and Bearberry Trail. This is a partial list. The condition estimate covers the whole network, so individual trails may differ.

What's the terrain and elevation like at Alderfer/Three Sisters Park?

Terrain data indicates an elevation of about 7,832 ft, an average terrain slope of 3.7° and a predominant ESE-facing aspect. Terrain slope does not measure the trail tread or its drainage features.

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Network profile

Network profile

Soil
Rocky sandydrainage input · modeled
Terrain
Moderateterrain slope
Tree cover
41%Partial
Elevation
7,832 ft
Average grade
3.7°
Predominant aspect
ESE-facing

Named trails

  • Mountain Muhly Trail
  • Dedisse
  • Ponderosa Trail
  • Sisters Trail
  • Bearberry Trail

This is a partial trail list. The condition estimate covers the whole network. Trail names from public agency data and © OpenStreetMap contributors.

Around Alderfer/Three Sisters Park

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