http://www.google.com/maps/d/kml?forcekml=1&mid=1Mr74hecbSiZ0LRXFr_ngVsgLHtw&lid=O1EivX3Gn5E

function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 11,
center: {lat: 41.876, lng: -87.624}
});

var ctaLayer = new google.maps.KmlLayer({
url: 'http://www.google.com/maps/d/kml?forcekml=1&mid=1Mr74hecbSiZ0LRXFr_ngVsgLHtw&lid=O1EivX3Gn5E.kml',
map: map
});
}