Bangour Reservoir is a small L-shaped water body nestled in the Bathgate Hills of West Lothian, situated within mixed woodland roughly 2 miles west-northwest of Dechmont, about 17 miles west of Edinburgh.

Built in 1902 to supply fresh water to Bangour General Hospital, the reservoir sits at 213 m (700 ft) above sea level, covers around 4. 9 ha (12 acres), and is retained by an earthen dam at its southern end.

Today the reservoir operates as Bangour Trout Fishery, an award-winning family-run still-water fishery offering traditional fly fishing for rainbow trout from wooden platforms.

The site is accessible from the M8 at junction 3, following signs toward Dechmont and Beecraigs Country Park.