Toolangi State Forest, State forest in Victoria, Australia

Toolangi State Forest runs from Mount Monda in the south to Murrindindi in the north, enclosing the township of Toolangi. It is mainly eucalypt forest regrown since the 1939 Victoria bushfires, with pockets of old-growth. Its tall, straight-trunked mountain ash include the Kalatha Giant, a tree 65.5 metres tall with a girth of 13.85 metres.

The forest is mainly eucalypt regrowth from the 1939 Victoria bushfires, with some old-growth pockets that were neither logged nor seriously burnt. Large sections burnt again in the 2009 Black Saturday fires. After those fires, the Toolangi and Castella community proposed a walk to the Kalatha Giant at Kalatha Creek, funded by the Victorian Bushfires Appeal Fund and opened by federal Environment Minister Mark Butler on 28 July, National Tree Day.

The name Toolangi is commonly linked to an Aboriginal word for stringybark gum trees, which still grow throughout the forest. The area around the township hosts the Toolangi Visitors' Centre, the starting point for the 4 km Yea River Walk and the 3 km Sculpture Walk. The forest is also known for the threatened Leadbeater's possum, a species that lives in its mountain ash stands.

Located about 90 minutes from Melbourne, the forest has designated areas for camping, hiking, mountain biking, and four-wheel driving. The trail network is extensive, so using a map or local information helps you choose the right route for your activity.

The Kalatha Giant, a mountain ash at Kalatha Creek, is the seventh largest tree in Victoria: 65.5 metres tall, 13.85 metres in girth and 200 cubic metres in volume, with heavy buttressing at its base. A walk to it was funded by the Victorian Bushfires Appeal Fund and opened by federal environment minister Mark Butler on National Tree Day, 28 July, after the 2009 fires.