The only 5k that allow strollers is the Princess 5k in Febuary. That was the first 5k I ever competed in and the strollers do not stay at the back. I understand running ahead and being faster than some people, but the first 15 minutes are pretty packed with everyone trying to start the 5k. BUT, it is really fun, and completely worth doing! I am obsessed now and competing in my 5th 5k, 2nd Disney 5k, this January!