Trail blazing

Trail blazing or way marking is the practice of marking paths in outdoor recreational areas with signs or markings that follow each other at certain, though not necessarily exactly defined, distances and mark the direction of the trail.

A blaze in the beginning meant "a mark made on a tree by slashing the bark" (The Canadian Oxford Dictionary). Originally a waymark was "any conspicuous object which serves as a guide to travellers; a landmark" (Oxford English Dictionary).

There are several ways of marking trails, including paint, carvings, affixed markers, posts, flagging, cairns, and crosses, with paint being the most widely used.