T5 geocaching involves using GPS devices to locate containers hidden in remote outdoor locations like mountains, with the goal of collecting trash found along the way. Participants must be at least 16 years old, use special equipment, and ensure caches are placed within a reasonable distance from home. While an outdoor treasure hunting game, geocaching also carries inherent risks like dangerous animals, insects, weather, and terrain that accompany hiking in remote natural settings. The containers usually contain small items and are designed to withstand the elements.