Just west of Gray's Lake are the of the Des Moines Water Works Park. The Water Works Park is along the banks of the Raccoon River immediately upstream from where the Raccoon River empties into the Des Moines River. The Des Moines Water Works Facility, which obtains the city's drinking water from the Raccoon River, is entirely within the Water Works Park. A bridge in the park crosses the Raccoon River. The Water Works Park recreational trails link to downtown Des Moines by travelling past Gray's Lake and back across the Raccoon River via either along the Meredith Trail near Principal Park, or along the Martin Luther King Jr. Parkway. The Water Works Park trails connect westward to Valley Junction and the recreational trails of the western suburbs: Windsor Heights, Urbandale, Clive, and Waukee. Also originating from Water Works Park, the Great Western Trail is an journey southward from Des Moines to Martensdale through the Willow Creek Golf Course, Orilla, and Cumming. Often, the location for summer music festivals and concerts, Water Works Park was the overnight campground for thousands of bicyclists on Tuesday, July 23, 2013, during RAGBRAI XLI.