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School of Rock

From noobs to crushers, there's always more you can learn.


The basics everyone should know. (14 articles)

Climbing Skills

Beginner to advanced skills for safe, efficient climbing. (26 articles)

Climbing Moves & Techniques

Tips to take your climbing up a grade. (17 articles)

Top Roping

New to climbing? Working out hard new moves? TR it! (4 articles)

Sport Climbing

Bolt clippin': low stress, high fun! (3 articles)

Trad Climbing

Pro and go. For many climbers, this is the sweet spot. (6 articles)


Low to the ground, but high in difficulty. (2 articles)

Alpine Climbing & Mountaineering

Cold nights, early starts, adventure, & marmots. (8 articles)

Ice Climbing

Sharp tools, hard ice, and cold temps. A thrill, both mental and physical. (4 articles)

Climbing Gear

What you need. How to use it. (13 articles)

Aid Climbing and Big Walls

Dreams of El Cap? There's a lot to learn. (6 articles)

Fixed Hardware: Bolting & Anchors

Technical details and instructions for bolts and other fixed hardware. (21 articles)

Injuries and Accidents

Prevent them. Escape from them. Recover from them. (14 articles)

Photography & Video

No more butt shots! (5 articles)


Climb better and stronger, with fewer injuries. (28 articles)

Today's Lesson

The Calf Lock

One of the most dreaded wide crack sizes is just bigger than your fists but too small for your knees. For most people, this means a four-inch crack. This size usually requires the hand/hand (“butterfly”) stack instead of a fist jam. Although hanging from such a stack feels q...

Featuring Content From


Aid and Big Walls (9) Alpine Climbing (34) Anchors (6) Beginners (26) Belaying (8) Bolting (2) Bouldering (6) Crack Climbing (2) Fundamentals (10) Gear (23) Gym Climbing (5) Ice Climbing (7) Injuries and Accidents (16) Knots (7) Leading (2) Multi-pitch (8) Nutrition (3) Offwidth (6) Photography and Video (5) Rappelling (9) Recovery (1) Safety (18) Skills (42) Slab and Face (1) Soloing (1) Sport Climbing (25) Technique (7) Top Roping (6) Trad Climbing (48) Training (31) Weather (3) Yoga (2)

Highest Rated Articles

Article Rating
50 Ways to Flail (21)
The Guide to Mountain Photography (5)
The Access Fund Gorilla Says... (5)
How to Prepare Your Tent for the Worst Storm  (6)
Climbing Dictionary (15)
Practice Falls When Climbing  (5)
Following Your First Big Wall (3)
Baggage Handling on Your First Big Wall (5)
5 Exercises for Your Ice Climbing Endurance  (8)
Bolt Installation (6)

Newest Articles

Article Date
Stress Corrosion Cracking and Corrosion

Dec 8, 2015

Managing Ropes on Snowy Ice Climbs

Jan 22, 2015

Nuts 102

Jun 20, 2014

How to Clean Sport Climbing Anchors

Jun 9, 2014

Your Goal: Climb 5.12a

Apr 12, 2014

6 Yoga Poses to Ease Hiking Muscles

Apr 12, 2014

Train Indoors For Ice and Mixed Climbing

Apr 12, 2014

The Best Rock Climbing Supplements

Apr 12, 2014

Heart-rate Training for Max Climbing Power

Apr 12, 2014

Effective Power Training for Climbing

Apr 12, 2014

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