The Rivière-Chézine old forest is an exceptional forest ecosystems of Quebec located in Saint-Gabriel-de-Valcartier, in La Jacques-Cartier Regional County Municipality, in administrative region of Capitale-Nationale, in the province of Quebec, Canada.

[1] The Rivière-Chézine Old Forest is located 50 kilometres (31 mi) northwest of Quebec, in the municipality of Saint-Gabriel-de-Valcartier.

[2] The forest is located in a mountainous region interspersed with deep valleys with steep slopes.

[3] The shrub layer, we especially observe the maple with ears of corn (Acer spicatum ), which is accompanied by the viburnum antlers (Viburnum lantanoides) elderberry (Sambucus racemosa), Balsam fir (Abies balsamea) and gadellier lacustre (Ribes lacustre).

The herbaceous layer is occupied by ferns of the genus Dryopteris sp., The beech beetle (Phegopteris connectilis), the mountain oxalid (Oxalis montana) and pubescent bramble (Rubus pubescens).