Please come visit. Jump start your trip by making your first stop at the Grand Lake Chamber, conveniently located on the corner of Highway 34 (also known as Trail Ridge Road) and Grand Avenue. Grand Lake is the ideal, year round family vacation destination. Physical Address: 1026 Park Avenue Mailing Address: P.O. The Grand Lake Chamber of Commerce and Visitors Center. Grand Lake, Colorado. Grand Lake, Colorado, adjacent to Rocky Mountain National Park and Arapaho National Forest, features miles of lakes and rivers, abundant wildlife, quaint shops, delicious dining, great nightlife and a multitude of activities and events. The Visitor’s Center has an array of handy brochures, maps and menus to help you plan your stay. Headwaters Marina on the shores of Grand Lake: 970-627-5031 Town Hall normal operating hours are Monday through Friday, 8 am to 4:30 pm. Please view the Municipal Calendar for Town Hall Closures.