Thought I would make a thread about ParkRun, as it's been a big help to me.
Here is a quick overview of what Park Run is.
"Parkrun organise free, weekly, 5km timed runs around the world. They are open to everyone, free, and are safe and easy to take part in.
These events take place in pleasant parkland surroundings and we encourage people of every ability to take part; from those taking their first steps in running to Olympians; from juniors to those with more experience; we welcome you all."
http://www.parkrun.org.uk/
If you don't think you are up to doing the run just yet, get down to the events on a Saturday morning and watch the runners, it's great to watch too, and you can also volunteer and help get things set-up and direct the runners. There is all ages and abilties that do the run, so you shouldn't feel out of your depth. They always have a little get together after the runs at my local ParkRun, so you can have a coffee and a chat. I was very warmly welcome at my local event. What better way to spend a Saturday morning than socialising and getting some exercise.