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Snow Water Equivalents
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26 vs. 27.5 vs. 29 Down Hills
Higher Tire Pressure is NOT Faster
Wider Rims Are Better and Why Tubeless Tires Burp Air
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120 Trails in 18 Days- A Southeastern MTB Epic
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About
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Purpose
Portfolio
Product Info
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Trail: building, science, art, journeys, and gear
Main Menu
Home
In The News
Happy Pi Day
Building
Menu Toggle
Trail Building History
Resource Materials
Building Insights
Menu Toggle
10 Most Common Trail Building Mistakes
Removing Rocks From Holes
Trail Hardening— Replacing or Capping Unsuitable Soils (Geotextiles)
Trees
Silvics of North America
Guide for Quality Trail Experiences (GQTE)
Politics
Menu Toggle
Liability
Trail Difficulty Ratings
Impacts of Mountain Biking
Muddy Trails
Shared Use Trails
Skidding Culture is Not Stewardship
Rules of the Trail
IMBA’s Position on The Wilderness Act
Trail Volunteerism
The Pollution of Viewsheds Hut by Hut
Avoid Gore-Tex
Tools
Menu Toggle
Trail Hand Tool Maintenance
Costs
Trail Builders’ Travel and Pay Guide
Science
Menu Toggle
Trailology
Trail Science pages
Menu Toggle
Trail Grades (and outslope)
Moving Rocks with High Lines and Levers
Bike Jump Design
Jump Building Guide
Roller (and drain) Design
Trail Turn Design
Downhill Coasting Bike Speeds
Crib Walls and Retaining Walls
Knot Science
Trail Math
Soil and Rock
Menu Toggle
Soil Compaction
Soil- surveys and more
Trail Surfacing
Sand and Gravel Filter/Drainage Design
Stability Criteria for Soils Under Seepage
Soil Mechanics- Slope Stability
Engineering Geology And Geotechnics
Rock Key, Selection, and Splitting
North East Geology
Footprints of the Ice Age
Geology of the Hudson Highlands
Water and Trails
Menu Toggle
Water and Trails Resources
Bridges and Culverts
Frost Heave
Snow Water Equivalents
Drainage Lenses
French Drains
Water Bars
26 vs. 27.5 vs. 29 Down Hills
Higher Tire Pressure is NOT Faster
Wider Rims Are Better and Why Tubeless Tires Burp Air
Art
Menu Toggle
Art
Stairs On Trails
Bridges and Culverts
Switchberms and Climbing Turns
Flow versus Flowy Trails
Journeys
Menu Toggle
Maps & Mapping Resources
Hikes and Rides
IMBA Epics
State High Points
120 Trails in 18 Days- A Southeastern MTB Epic
Find A Spring
Why vegan?
Dirty Century
Menu Toggle
About Dirty Century
Code
SDDC
SD Big Ring
SD Big Point Rides
SD DHC
Epic MTB Rides- Worldwide
Sights
Menu Toggle
The Biodiversity Heritage Library
Critters
Vistas
Bridges
Rustifacts
Rocks
Water
Fueling the Journey
Gear
Happy Pi Day
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In The News
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ErikMM
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