A snowmobile includes a side panel that is mounted to the snowmobile's frame about a generally vertically extending side panel axis. In a closed position, the side panel protects and encloses a lateral side of the snowmobile's engine. In an open position, the side panel facilitates easy access to the engine. The side panel includes a lower leg support that includes a knee rest, a lower front leg support, and an inner leg support. The lower leg support improves the rider's comfort and ability to actively position himself on the snowmobile. The snowmobile also includes a rewind starter operatively connected to the engine. The rewind starter is accessible through a hole formed in the side panel.