LoamLoam App StoreGoogle Play

Hillside to Hollow Reserve

Mountain bike trail conditions · Boise, ID 43.653° N  116.220° W   2,966 FT Verified

DRY: Rideable

Thursday, October 22nd at 1pm Conditions turn Caution.

Recent rain
No measurable rain in the past week
Today
73°Fheavy rain
  • Mon 10/12, no measurable rain, daily high 55 degrees Fahrenheit, modeled conditions: DRY
  • Tue 10/13, no measurable rain, daily high 61 degrees Fahrenheit, modeled conditions: DRY
  • Wed 10/14, no measurable rain, daily high 68 degrees Fahrenheit, modeled conditions: DRY
  • Thu 10/15, no measurable rain, daily high 70 degrees Fahrenheit, modeled conditions: DRY
  • Fri 10/16, no measurable rain, daily high 76 degrees Fahrenheit, modeled conditions: DRY
  • Sat 10/17, no measurable rain, daily high 76 degrees Fahrenheit, modeled conditions: DRY
  • Sun 10/18, no measurable rain, daily high 72 degrees Fahrenheit, modeled conditions: DRY
  • Mon 10/19, no measurable rain, daily high 75 degrees Fahrenheit, modeled conditions: DRY
  • Tue 10/20, no measurable rain, daily high 73 degrees Fahrenheit, modeled conditions: DRY
  • Wed 10/21, no measurable rain, daily high 76 degrees Fahrenheit, modeled conditions: DRY
  • Today, Thu 10/22, 0.97 inches of rain, daily high 73 degrees Fahrenheit, modeled conditions: DRY then CAUTION then DRY then STAY OFF
  • Fri 10/23, 0.11 inches of rain, daily high 54 degrees Fahrenheit, modeled conditions: STAY OFF then CAUTION
  • Sat 10/24, no measurable rain, daily high 58 degrees Fahrenheit, modeled conditions: CAUTION
  • Sun 10/25, no measurable rain, daily high 63 degrees Fahrenheit, modeled conditions: CAUTION
  • Mon 10/26, no measurable rain, daily high 67 degrees Fahrenheit, modeled conditions: CAUTION, forecast preview, beyond the free window
  • Tue 10/27, no measurable rain, daily high 69 degrees Fahrenheit, modeled conditions: CAUTION, forecast preview, beyond the free window
Updated

Updated Thursday, October 22nd, 2026 at 20:29 UTC. Verdict last changed: Thursday, October 22nd. Official closures and current trail conditions take priority.

Modeled hourly. Closures and local conditions take priority.

Watch Hillside to Hollow Reserve for free

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

After installing, search for Hillside to Hollow Reserve and turn on alerts.

Already have Loam? Open this trail

Download on the App StoreGet it on Google Play

Is Hillside to Hollow Reserve rideable today?

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

Over the tracked history, Hillside to Hollow Reserve has been rideable on 10 of the last 10 days. Loam also considers soil, slope, tree cover, and drying time.

Soil and terrain at Hillside to Hollow Reserve

Hillside to Hollow Reserve is a mountain bike trail network in Boise, ID. Soil data at the sampled location is classified as sandy. Open tree cover can allow more sun and wind exposure, helping drying. Terrain data indicates an elevation of about 2,966 ft, an average terrain slope of 6.9° and a predominant SW-facing aspect. Terrain slope does not measure the trail tread or its drainage features. Trails here include Harrison Hollow (AWT), Buena Vista and Harrison Ridge. 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

SoilSandy

Sandy soil generally allows water to drain readily. Rainfall, shade and trail construction also affect recovery. The model uses surveyed water-retention values, not measured trail recovery times.

CanopyOpen 10%

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 Hillside to Hollow Reserve right now?

The current estimate for Hillside to Hollow Reserve is DRY: rideable. Rideable now. Good window for the next ~8 hours. No measurable rain in the past week.

Is Hillside to Hollow Reserve muddy right now?

Loam currently estimates dry conditions (DRY). Sandy soil usually drains quickly. No measurable rain in the past week.

What is the soil and trail surface like at Hillside to Hollow Reserve?

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

How long does Hillside to Hollow Reserve take to dry after rain?

Hillside to Hollow Reserve 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 Hillside to Hollow Reserve after rain?

Sandy soil can help drainage, but heavier rain, shade and the trail surface also affect recovery. 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 Hillside to Hollow Reserve?

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 Hillside to Hollow Reserve?

Trails at Hillside to Hollow Reserve include Harrison Hollow (AWT), Buena Vista, Harrison Ridge, Who Now Loop and Full Sail. 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 Hillside to Hollow Reserve?

Terrain data indicates an elevation of about 2,966 ft, an average terrain slope of 6.9° and a predominant SW-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
Sandydrainage input
Terrain
Moderateterrain slope
Tree cover
10%Open
Elevation
2,966 ft
Average grade
6.9°
Predominant aspect
SW-facing

Named trails

  • Harrison Hollow (AWT)
  • Buena Vista
  • Harrison Ridge
  • Who Now Loop
  • Full Sail

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

Around Hillside to Hollow Reserve

Nearby networks

Polecat Gulch Reserve2 MI Camel's Back and Hulls Gulch Reserves2 MI Boise Foothills3 MI Albertson Family Bike Park3 MI Military Reserve3 MI

Every Boise network →