| Built from | Bolts, gear, or natural features |
| Must be | Redundant, equalized, strong |
| Used for | Belaying, rappel, top-rope |
| Difficulty | Intermediate (requires instruction) |
An anchor is the system of connected points — bolts, removable gear, or natural features — that secures climbers to the rock for belaying, rappelling, or top-roping. A sound anchor is redundant, equalized, and strong enough to hold any expected load. Building reliable anchors is one of the most safety-critical skills in climbing.
What makes one safe
The principles (ERNEST/SERENE): solid pieces, redundancy, equalization, and no extension if a point fails — all brought to a master point.
How it’s built
From two or more bolts, placed cams and nuts, or natural features, linked with a cordelette or sling.
Safety
Anchor building is judgment-heavy and unforgiving. This article is educational and not a substitute for hands-on instruction from a qualified climbing instructor.
Frequently asked questions
What makes a good climbing anchor?
A good anchor is strong, redundant (more than one point so no single failure is catastrophic), equalized (load shared between points), and built with no extension if a point fails. It must also be oriented for the expected direction of pull. These principles are often summarised as SERENE or ERNEST.
What does SERENE or ERNEST mean?
They're acronyms for anchor principles. ERNEST stands for Equalized, Redundant, No Extension, Solid, and Timely; SERENE for Solid, Equalized, Redundant, Efficient, No Extension. Both capture the same goal: an anchor that shares load and survives a single point failing.
What is the master point of an anchor?
The master point is the single, strong central point where the anchor's pieces are brought together and where you clip your belay device and tether. Bringing everything to one equalized master point keeps the system simple, redundant, and easy to check.
Sources
- Building anchors — American Alpine Club
- Anchoring standards — AMGA