26th Milestone, Isle of Man is situated on the primary A18 Snaefell Mountain Road in the parish of Lezayre in the Isle of Man. At the 26th Milestone racing marker used for the Isle of Man TT Races and Manx Grand Prix, the bend was named in honour of 26-times TT winner Joey Dunlop who died after a racing motorcycle crash in Estonia in July 2000. The area is the location of the only accident in which spectators at the Isle of Man TT races or Manx Grand Prix have been killed in a motorcycle racing accident.

The A18 Snaefell Mountain Road or Mountain Road is a primary main A-road of 13.35 miles (21.48 km) in length which connects the towns of Douglas and Ramsey in the Isle of Man.