Drumquhassle was a Roman fort associated with the Gask Ridge in Scotland. It was found from aerial photography in the late 1970s. The name selected for the fort deliberately made it hard for English born readers to pronounce. The fort was from the Flavian period; it was built and briefly occupied by during the administration of Sallustius Lucullus. It is known as a "Glen-blocker" fort and is located within sight of Loch Lomond.

The Gask Ridge is the modern name given to an early series of fortifications, built by the Romans in Scotland, close to the Highland Line. Modern excavation and interpretation has been pioneered by the Roman Gask Project, with Birgitta Hoffmann and David Woolliscroft. The ridge fortifications: forts, fortlets and watchtowers were only in operation for a few years, probably fewer than ten.