Decathlon – Stevenage, Monkswood – Opening Hours & Store Details Decathlon is easy to get to on Monkswood Way, approximately a 0.47 mile distance south-west from the centre of Stevenage (accessible from Junction 7 (Langley Sidings) of A1 (M)). This store serves customers from the areas of Knebworth, Poplars, Symonds Green, Pin Green, Roebuck, Aston, Old Town, Broadwater, Stevenage Town Centre, Bedwell and Shephall. If you would like to swing by today (Friday), its working hours are 9:00 am until 8:00 pm. Please see the various sections on this page for specifics on Decathlon Stevenage, Monkswood, including the opening times, place of business address details, direct phone and further information about the store.