Creve Coeur Lake Trail Extension is a hiking and biking trail in Maryland Heights, Missouri. It is within Creve Coeur County Park. It is 4.2 miles long and begins at 452 feet altitude. Traveling the entire trail is 0.4 miles with a total elevation gain of 11 feet. The Eileen A. Pfeifer Shelter is near the trailhead. There is also a parking.