Since the driving distance from St. Louis to Breckenridge is so long, you will need some activities and interesting resting stops to keep things fun. The fastest route to take is I-70 West and the actual distance in miles is 928 miles. I-70W literally takes you all the way from Missouri to Breckenridge! There are many nice places to stop and take a break on your way like Columbia, MO, Kansas City, MO & Kansas, Topeka, KS, Salina, KS, Hays, Colby, Denver & Keystone, CO. Bu as you pass Kansas City, you will notice that cities get much smaller and the stops won’t feature many things to do anymore until you get all the way to Denver! Therefore, reading this entire article might help you get ready for some unexpected travel issues like not finding a gas station if you need one!