The Stevenage Half Marathon began in 1984 and takes place annually with a full marathon every 10 years (the next Stevenage marathon is due 2024).
Race headquarters is at Hampson Park Community Centre with the race itself comprising of two loops taking in Fairlands Valley Park and some of the town centre before returning to the start finish area for your second lap and then the race to the finish.
The route is completely road or cycle path based, so there are no muddy sections to worry about and is completely signposted and marshalled so you can be sure of a warm welcome and encouragement all the way around the 13.1 miles.
Although designed as a charity fundraising event, the course is officially measured (http://coursemeasurement.org.uk/detail.php?area=South&no=2023214) and is hosting the Hertfordshire Road Running Half Marathon senior championships, which you can enter if you were born in Hertfordshire or resident for the previous nine months.