After several years of C25k training with timeout from injuries and colds, I completed my first Parkrun on Saturday. My time was 35mins (5k) thanks to having 100+ to run alongside (I'm in the 65-70 age range). I was about half way through the pack. Now to keep turning up each Saturday for the run. I love the speedy online feedback as well. I would encourage everyone to search out their nearest event. It's free and you can walk if you wish. They have a delegated person to bring up the rear, so you will not run the risk of being last.
It's the fastest I've run for decades and take encouragement in that my legs ached no more than they would have after a normal run. Maybe the small hills that I'm forced to run each day have their benefits.