Glossary I

Articles containing information regarding Glossary I

• Ice axe (snow travel context)

  An ice axe, in the context of snow travel for hikers, is a specialized tool used for balance, security, and self-protection on firm snow slopes. It is associated with more advanced conditions than typical three-season trail hiking.

• Ice bridge / snow bridge

  An ice bridge or snow bridge is a span of snow or ice that covers a gap, such as a creek, void, or hollow, creating an apparent solid surface that may or may not be weight-bearing.

• In-camp clothing

  In-camp clothing refers to the layers reserved primarily for use at rest stops and overnight camps, rather than for active hiking. These items emphasize comfort and warmth after movement has slowed or stopped.

• Inreach-style satellite messenger (generic)

  An Inreach-style satellite messenger, in generic terms, is a handheld device that uses satellite networks to send and receive messages, share location, and in many cases trigger emergency assistance requests.

• Insect head net

  An insect head net is a lightweight mesh covering worn over a hat or head to reduce insect contact with the face and neck. It is commonly used in areas or seasons with high mosquito or fly activity.

• Insect season

  Insect season refers to periods when flying insects such as mosquitoes, black flies, or midges are especially active along a route. These periods can strongly influence comfort and trip planning.

• Insulated jacket

  An insulated jacket is a midlayer or outer layer containing synthetic or down insulation, used to provide warmth during rest periods, cool conditions, or around camp.

• Insulated pad

  An insulated pad is a sleeping pad designed with materials or structures that reduce heat loss to the ground, contributing significantly to overall sleep system warmth.

• Internal frame pack

  An internal frame pack is a backpack with a load-bearing structure built inside the pack body, designed to transfer weight efficiently to the hips and improve stability while hiking.

• IT band (iliotibial band) issues

  IT band issues refer to discomfort or pain associated with the iliotibial band along the outside of the thigh, which some hikers experience during long or repetitive walking, especially on descents.

• Itemized gear list

  An itemized gear list is a detailed inventory of all items a hiker plans to carry, often including weights, categories, and notes. It is used for planning, comparison, and refinement of a kit.

• Itinerary

  An itinerary, in a thru-hiking context, is a planned outline of where a hiker expects to travel and resupply over time. It is a flexible guide rather than a rigid schedule.