Robert Cowden left New Haven, Kansas in April with almost nothing: a cart of camping gear, a pointer-mix dog named Enzo, and a plan to cross half the United States under his own power. The route is split in two — walk nearly 2,000km east to Pittsburgh, then paddle a canoe roughly 3,200km down the rivers to the Gulf of Mexico.

The walking leg is done. Cowden finished in September and has now swapped boots for a paddle, launching on the Allegheny River at Pittsburgh before joining the Ohio. He's averaging about 20km a day on the water and hopes to cover the 1,579km down the Ohio to the Mississippi confluence in Illinois in under 40 days — currently on schedule. The Gulf is the end goal by the close of 2026.

What makes the story more than a route log is why he's doing it. Before setting out, Cowden's alcohol addiction had cost him his job, his car and his home. A residential treatment programme was the way out, but it would have meant leaving Enzo with nowhere to go. So he walked instead — got sober, and turned the expedition into part of rebuilding a life, with housing lined up for when the trip ends.

The trail has tested the usual warnings, too. He says everyone cautioned him about dangerous people on a walk across America; instead, passing through Missouri, he found the opposite — a steady stream of generosity from strangers, both on the road and online, that has kept the expedition moving.

River travel brings its own headaches. Long stretches of slow water on the Ohio have meant near-constant paddling, and Enzo, who could rest in the cart during the walking stage, now rides in a canoe for weeks at a time. Cowden posts regular updates on Facebook and his expedition page for anyone following along.

Why should a traveller care? Partly because it's a rare, ground-level portrait of the American interior — the small towns of Missouri, the Ohio River valley, the working barge waterways most of us only fly over. But mostly because it's a reminder that the classic crossing-America expedition doesn't have to be about records or sponsorships. Sometimes it's just a person, a dog, and a reason to keep moving. If slow river travel through the US heartland appeals, the Ohio-to-Mississippi route Cowden is paddling is one of the most underrated long-distance water trips on the continent — and his updates make a decent real-time guide to what it's actually like.