River Coln

The River Coln is a Cotswold river that rises on the high wolds near Sevenhampton and runs south-east through Bibury, Coln St Aldwyns, Quenington and Fairford, to join the Thames at Inglesham, just west of Lechlade. At Bibury it flows past the Swan, Bibury Mill and Arlington Row, the stretch most visitors know.

Course

The Coln is a river of the limestone. The Environmental Change Network, which monitors its water, puts its source at about 200m above sea level near Sevenhampton, east of Cheltenham, from where it flows over the Inferior Oolite and then the Great Oolite, before crossing the Oxford Clay to meet the Thames at about 75m. It has no major tributaries; water is taken from the catchment, and discharges and low flows make its water quality vary along its length.

From the source the river runs south-east past Andoversford and Withington. Between Withington and Fossebridge it passes below Chedworth Roman Villa, and then it comes down past Ablington to Bibury, on to Coln St Aldwyns and Quenington, which face each other across the valley, and Fairford, a market town on its banks. Below Fairford it crosses the flat land to the Thames at Inglesham, where the old Thames and Severn Canal also met the river.

The river at Bibury

Bibury is where most people meet the Coln. The river runs beside the road past the Swan, under a bridge of three oval arches dated 1792 beside Bibury Mill, and past Rack Isle, the water meadow between the river and the leat of Arlington Mill, in front of Arlington Row. The National Trust owns both. The Victoria County History says fulled cloth was evidently dried on Rack Isle, which was linked with Arlington Mill by 1680, and that it became a wildfowl reserve in about 1956; the National Trust says the name comes from the racks on which wool was hung to dry after washing. Arlington Row, across the meadow, is listed as a late fourteenth-century wool store that was altered into weavers' houses in the late seventeenth century.

Bibury Trout Farm is also on the river here; the Environmental Change Network names it as the largest discharge into the Coln, most of it flowing through its fish ponds.

Wildlife and water

The valley around the Coln is mostly farmland, grazed in its upper reaches, with large deciduous woods to the south-west. At Bibury the National Trust looks after Rack Isle as a wildlife habitat and says it is home to water voles, and that you might also see kingfishers, grass snakes and dragonflies there. A small herd of Belted Galloway cattle grazes the meadow in late summer.

Keep to the public paths, as much of the valley is private farmland. The Environmental Change Network names sewage works at Andoversford, Bibury and Fairford as the main sewage inputs to the river.

Walks along the Coln

Five of our walks follow or cross the river:

• Bibury and the River Coln, a 4-mile (6.5km) loop from the bridge by the Swan, crosses it beside the mill and goes up through Oxhill Wood
• Bibury and Ablington, 5 miles (8.2km), goes over the wold to the hamlet of Ablington and comes back along the river
• Bibury, Oxhill Wood and Akeman Street, 4 miles (6.6km), starts at the same bridge and climbs to the Roman road
• Coln St Aldwyns and Bibury, 6.5 miles (10.6km), follows the river upstream from Coln St Aldwyns to Arlington Row on field paths
• Lechlade and St John's Lock, 3 miles (4.8km), goes out to the Round House, where the Coln and the line of the old canal meet the Thames

Visiting

The Coln is free to walk beside wherever a public path runs. In Bibury the National Trust's tarmac path in front of Arlington Row and round Rack Isle is level, narrowing at a small bridge over the mill stream, and dogs are welcome on leads. Bibury is crowded on summer weekends; come early in the morning or out of season, and park with care, as the village has no council car park. Elsewhere the river paths cross fields with stock, gates and stiles. On the Bibury river loop, walkers on AllTrails reported deep mud and slippery paths after heavy rain in November 2025, and cattle in the fields in April 2025 and May 2026.

Nearby

Along the river are Arlington Row and St Mary's Church in Bibury, St John the Baptist's Church in Coln St Aldwyns, the Knights Hospitallers' Gateway in Quenington and St Mary's Church in Fairford, with the Thames at Lechlade at the end. To eat and stay, the Swan stands by the bridge in Bibury, the New Inn is in Coln St Aldwyns, the Keepers Arms in Quenington and the Bull on Fairford's Market Place. Our guide to Cirencester and the Coln valley covers the villages.