Take a left immediately after crossing the bridge into Seuss Landing. It's not a large walkway, but weaves around the side of Green Eggs and Ham and comes out right before the bridge that leads to Lost Continent.
The main path continues straight and to the right, where it loops around the Caro-Suess-el and shops before heading back toward Lost Continent.
It's great when you're walking into the park and a group takes off running, but goes the long way, and you pop out ahead of them, still strolling along!