Every hiking season, a peculiar image starts flooding long-distance trail forums and summit photo feeds: a hiker at the finish line, grinning, pouring a beer into their filthy, sweat-soaked trail runner and chugging it. The staff at hiking site The Trek see so many of these photos that one writer has finally cracked and pleaded publicly with thru-hikers to stop. They didn't, of course. The ritual even has a name: the shoey.

The tradition is especially popular on the Continental Divide Trail, one of America's Triple Crown routes, where finishing hikers mark the end of months of walking with a beverage served in the least hygienic vessel imaginable — a shoe that has clocked hundreds of miles of dust, mud and miles of foot funk. Triple Crown finisher Kelly "Toddler Snacks" described her celebration at the CDT's southern terminus as pure hikertrash theatre: shoes cheers'd and raised treads-up, followed by a full chug. Her verdict after 500 miles of accumulated stank? Surprisingly drinkable — she said her Coke shoey just tasted like soda.

Here's the twist that surprised even long-time trail watchers: the shoey isn't a Gen-Z trail invention. Drinking from shoes reportedly goes back to the Middle Ages, when it was considered good luck, and the habit shows up across all kinds of endurance sports — Formula 1 fans will recognise it from podium celebrations. Thru-hikers didn't invent it; they just gave it their own grimy flourish.

The Trek writer ran through every rational explanation — a dedicated clean pair of celebration shoes, a sterile liner, maybe it's all staged for the camera — and concluded the answer to all of them is no. The real motivation is simply "why not?" It's quirky, unexplainable and gross in the oddly charming way that seems to be a job requirement for people who walk 2,000-plus miles for fun.

Why does any of this matter if you're not attempting a thru-hike? Because trail culture is half the appeal of visiting America's long-distance routes. Hike even a section of the Appalachian, Pacific Crest or Continental Divide trails and you'll encounter this world: trail names, trail magic, and rituals that make no sense to outsiders. Knowing the shoey means you'll understand what's happening when a dusty stranger offers you a celebratory drink at a trailhead — and you can decide in advance whether you're a participant or a spectator. Most of us, respectfully, will remain spectators.