trailhead noun2 •The beginning of a trail, often specifically a hiking trail.Take a bus or a cab to the trailhead, and walk a couple of hours to the magnificent, cow-inhabited Tai Long Wan beach. — 2010 •The initial clue that leads to an alternate reality game.The trailhead can be exposed to potential gamers through social network services, websites, emails, or sometimes non-electronic media. — 2017 formstrailheads
