The 9th Annual Blobfest 5K, 10K & Half Marathon!

Prepare for a monstrously good time at the 9th Annual Blobfest 5K, 10K & Half Marathon, taking over Phoenixville, PA, on Sunday, July 12, 2026! This unique running event celebrates the infamous 1958 horror flick, "The Blob," with a portion of all registration fees supporting the historic Colonial Theatre, the very venue featured in the film. Choose your challenge from the 800M Kids Fun Run, a fast-paced 5K, a rewarding 10K, or test your endurance with the Half Marathon. Runners consistently praise this event as Phoenixville's premier running experience, lauded for its vibrant atmosphere and "incredible Blob-themed finisher's medals" awaiting every participant.

The race kicks off and finishes right in front of the iconic Colonial Theatre on Bridge Street, which will be closed to traffic for the event. While the 5K boasts an entirely paved course, the 10K and Half Marathon routes incorporate approximately three miles of crushed hardpack trail, with the remainder on macadam. Be prepared for a challenge, as the longer distances feature significant hills, particularly two "insane" climbs in the second half of the half marathon that runners encounter twice. The course offers scenic stretches along the Schuylkill River, with some shaded sections in the early miles. Aid stations are well-stocked with water, electrolyte drinks, and even gels, plus refreshing water sprayers on the half marathon course, though 10K and Half Marathon participants are encouraged to carry their own hydration due to typical July heat. Race day conditions typically see highs around 85F and lows around 65F, with a 16% chance of precipitation, so plan accordingly.

What truly sets Blobfest apart is its lively, community-centric atmosphere. Non-runners can even get in on the action by participating in a course decoration contest, creating Blob-themed scenes for runners to enjoy and vote on, with gift cards for the winners. With options to switch to a shorter distance on race day if the heat proves too challenging, the 9th Annual Blobfest promises an unforgettable blend of athletic endeavor and cinematic celebration. Come for the run, stay for the fun, and embrace the spirit of Phoenixville's most unique holiday!