11th Milestone, Road curve on A3 Castletown to Ramsey Road, Isle of Man

The 11th Milestone is a series of bends on the A3 Castletown to Ramsey road, forming an elongated S-bend on the boundary between Kirk German and Kirk Michael. The final bend is marked by a white-painted masonry bridge parapet and is known as Drinkwater's Bend. The actual 11th marker post for the TT Mountain Course stands at Cronk Bane Farmhouse on the Cronk-y-Voddy straight, just before the bends.

The A3 between Cronk-y-Voddy and Handley's Corner was re-profiled in the 1830s by the parish highway surveyor to avoid marshland and steep inclines, creating the elongated S-bend. A stone 11th milestone once stood near the Glen Helen corner café; an iron milestone from the 1860s, when James Garrow was Surveyor-General, now stands at the bend's northerly end as the 13th Milestone. The current 11th marker for the TT Mountain Course is at Cronk Bane Farmhouse.

The whole sequence of bends is called the 11th Milestone, but its last corner is named Drinkwater's Bend after Ben Drinkwater, who died there on 13 June 1949 during the Junior TT on a 350cc Norton Manx. He had planned to retire after that race and move into sponsoring young riders. A white-painted masonry bridge parapet marks the corner.

The post sits on an active road with curves, so care is needed when stopping nearby. It is easy to spot when traveling from Castletown to Ramsey due to its distinctive height.

The 11th Milestone marker for the TT Mountain Course now stands at Cronk Bane Farmhouse on the Cronk-y-Voddy straight, just before Drinkwater's Bend, and the organisers' sign there is missing. The whole sequence of bends, not a single post, carries the name. The original stone 11th milestone stood by the corner café at Glen Helen.