Definitions

Walking outdoors. Equipment may include a backpack with water, food, clothing, and first aid kit, or trekking poles.

In-between hiking and rock climbing, where hands are used for balance and a rope might be carried and used.

For Class 2: Simple scrambling, with possible occasional use of hands – Use Hiking as the subject term and scrambling within the title or description.
For Class 3: Scrambling; hands are used for balance, a rope might be carried – Use Rock Climbing as the subject term and scrambling within the title or description.

Climbing on boulders or shorter cliff walls without a rope. Foam pads are used for protection from falls.

Use Rock Climbing as the subject term and use bouldering within the title or description.

Rock climbing involves the use of a rope, belaying, and protection (natural or artificial) to protect the leader from a long fall.

Descending on a rope. Both mechanical and non-mechanical methods exist for rappelling.

The climbing of mountains, especially using special equipment and techniques on rock, ice, or snow.

Climbing mountains either on skis or carrying them and then descending on skis.

Use Ski Mountaineering as the subject term when both skiing and mountaineering equipment are present (e.g. skis, campons, axe, ice tools, rope, harness).

Skiing outside of a ski resort in unmarked or unpatrolled areas (also called off-piste).