Ahmic Forest and Rock Barrens Conservation Reserve is located in the Territorial District of Parry Sound. It extends to 2 kilometres southeast of the hamlet of Dunchurch and 5 kilometres east of the hamlet of McKellar in the Territorial District of Parry Sound. The eastern half of the site is within the Municipality of the Township of Magnetawan (Croft and Spence wards), with lesser amounts within the Township of McKellar and the Municipality of Whitestone (Croft and Hagerman wards).
Ahmic Forest and Rock Barrens Conservation Reserve encompasses a large area of remote forest and rock barrens habitat. Owing to its relatively large size of 6,081 hectares, the conservation reserve contains a diversity of botanical and wildlife habitats.
The conservation reserve is located southeast of Ahmic Lake, which is part of the Magnetawan River system. The northern portion of the reserve forms part of the Magnetawan River’s catchment area, while the southern portion drains into the Manitouwabing River and thence into the Seguin River. These three rivers, along with the French and Pickerel Rivers to the north, are historically significant.