Knowledge Library

Gear guides, skills, science, and wilderness know-how — free for everyone.

Gear

Choosing the Right Tent

Season ratings, weight vs. livability, footprints, and what to look for when buying your first or next shelter.

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Gear

Essential Gear for Every Trip

What goes in the pack for a day hike vs. an overnight. Checklists, weight targets, and the items most people forget.

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Gear

Understanding the Layering System

Base layer, mid layer, shell — how each layer works, what fabrics to choose, and how to manage body temperature on the trail.

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Skills

Water Filtration in the Backcountry

Filters, purifiers, UV pens, chemical treatment — how each method works, when to use it, and what it won't protect against.

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Skills

Map & Compass Navigation

Reading topographic maps, taking a bearing, triangulating your position, and why you should always carry a compass even with GPS.

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Skills

Triangulation — Fix Your Location

Identify two landmarks, take bearings, plot lines of position — how to pinpoint exactly where you are on a map.

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Skills

GPS Devices for Hikers

Dedicated GPS vs. smartphone apps, loading tracks, GPS limitations, and why you always need a paper backup.

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Skills

How to Build a Campfire — Lean-To Method

Tinder, kindling, fuel, and the lean-to method step by step. Plus how to put it out completely and safely.

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Skills

Leave No Trace — The 7 Principles

Plan ahead, travel on durable surfaces, dispose of waste properly — all seven LNT principles explained.

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Skills

Wag Bags & Backcountry Waste

Cat holes, wag bags, and California regulations for human waste disposal in the wilderness — done right.

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Skills

Understanding Wilderness Permits

Why permits exist, lottery systems, popular California permit zones, and tips for getting your spot.

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Nature

Reading Signs of Glaciation

Cirques, moraines, erratics, U-shaped valleys — how to recognize the landforms left behind by ancient glaciers.

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Nature

Introduction to Plant Morphology

Leaf arrangement, venation, flower structure, and the vocabulary you need to start identifying California native plants.

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Nature

How the Sierra Nevada Was Formed

Granite plutons, subduction, crustal uplift, and glaciation — the full geologic story of California's iconic mountain range.

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Nature

Erosion — How Landscapes Are Shaped

Mechanical weathering, chemical weathering, water, and wind — how they sculpt the terrain beneath your boots.

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Nature

Wilderness Conservation Laws

The Wilderness Act, NEPA, ESA, and California's key conservation legislation — the laws that protect wild places.

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Safety

The 10 Essentials — Updated

The classic list modernized: navigation, sun protection, insulation, illumination, first aid, fire, repair tools, nutrition, hydration, and shelter.

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Safety

Fire Preparedness in the Backcountry

Reading fire restrictions, fire-safe camping practices, and what to do if you encounter a wildfire on the trail.

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