The Golden Valley Line is a railway line from Swindon to Cheltenham Spa in England. The line was originally built as the Cheltenham and Great Western Union Railway in the 1840s. It diverges from the Great Western Main Line at Swindon and (after going through the Sapperton railway tunnel and down the Golden Valley to Stroud), joins the Bristol Temple Meads to Birmingham New Street main line at Standish Junction just north of Stonehouse.