Parking is available free of charge on the grasscrete car park behind the rugby stadium, signposted ‘Car Park 6’. (The Rushmoor parkrun car park). This is accessed from Princes Avenue, Aldershot, GU11 2LQ.
If you are coming from the Farnborough direction, or if you want a quick getaway after the event, you can use alternate parking for a small fee of 70p for 3 hours (or 90p for 4 hours) at Napier Gardens short stay car park on Redvers Buller Road, North Camp, GU11 2JH. From here it is only a 1km walk to the rugby stadium.
A map showing car parking can be found here.