I've discovered the Passageway to the Pacific It's the Snake River-the North Fork But Lewis and Clark didn't know that. They took the wrong fork at Three Forks, Montana. They should have taken the "Madison" River, not the Jefferson. The Madison takes you south into the Snake River which is in Island Park, Idaho. The Snake is a wide, deep-flowing river that flows into the Columbia River-which was Lewis and Clark's destination in 1805. The book describes the unique country where these three states meet-Idaho, Montana and Wyoming. This area includes Yellowstone, the Tetons and Island Park. The...