The 9th Annual Blobfest 5K, 10K & Half Marathon! – Phoenixville, PA 2026

The BEST Phoenixville running event (with the BEST finisher's medals) during the BEST local holiday in all of America, is BACK for 2026! On Sunday July 12th, Steve McQueen and YOU star in the horror movie of the century! Uh... last century! Every year, Phoenixville, PA celebrates Blobfest in honor of 1958's The BLOB. And every year , we throw a running party to help celebrate and support the historic Colonial Theatre that stars in the film! Join us as we start and finish right in front of the Colonial Theatre for our 5K, 10K, Half Marathon, and Kids Fun Run! Course Decoration Contest! Not a runner? Get a group of friends together to participate in our course decoration contest and you could win gift cards to our local Phoenixville restaurants. Here's how it works: Your group will be given an area on the 5K course to decorate in some Blob (or other monster/alien) theme. The only rule is that you don't obstruct or startle our runners. After the race, runners will vote for the best scenes