Douglas Martin Lampkin MBE is an English former professional motorcycle trials and endurocross rider. He competed in the FIM Trial World Championships from 1994 to 2006. Lampkin is notable for being a seven-time motorcycle trials world outdoor champion. He is the second most successful trials rider in history, after Toni Bou with 30. In 2012, Lampkin was named an FIM Legend for his motorcycling achievements.

Motorcycle trials, also known as observed trials, often called simply trial or trials, is a non-speed event on specialized motorcycles. The sport is most popular in the United Kingdom and Spain, though there are participants around the globe.