Splendid Mountain Watercolours or Splendid Mountain Sketchbook is a collection of sketches and watercolors by John Singer Sargent (1856–1925), executed when he was fourteen years old, and on a summer excursion to Switzerland's Bernese Alps in the Berner Oberland in 1870. The sketchbook contains 60 leaves, including 14 watercolors and 47 crayon or graphite studies of the mountains, landscapes and people he encountered while traveling with his family. In 1950 his sister, Frances Ormond, bequeathed it to the Metropolitan Museum of Art; in 1988 it underwent conservation.