Hargrave says the major evolutions of drift boat design have focused on the materials. The first dories were made of wood. “The limitations of wood as a material is that they’re going to bash against rocks, break down, and result in having to be on a pretty aggressive maintenance cycle,” says Hargrave. Then came metal dories, which were heavy, but that wasn’t even the biggest problem. “When you hit a rock, metal is indestructible, but it’s loud,” he says. “That’s obviously not ideal when you’re trying to sneak up, or fish a specific line in the river, and then you hit a rock and your shots are blown.” Fiberglass was the solution, but even that had its limitations. Then came Andy Toohey, founder of Boulder Boat Works.