Greno Woods is a 178 hectares (440 acres) area of ancient woodland and nature reserve located north of Grenoside village, a suburb of Sheffield, South Yorkshire, England.

Previously used as a quarry, hunting ground, and for commercial forestry; it is now used for recreational walking, jogging and mountain biking.

The woodland existed as early as 1600,[1] some its oldest trees include oak, beech and sweet chestnut.

[2] Greno Woods was used for the quarrying of Grenoside Sandstone, as a hunting ground for deer, and for commercial forestry in the 19th century.

[7] Greno Woods also hosts a popular mountain biking event, 'Peaty's Steel City Downhill', founded by professional biker Steve Peat.