Shallow River Provincial Park is a 2.25 hectare nature reserve established in 1985. Ontario Parks places it about 55 kilometres southeast of Cochrane.
The official page describes a tiny two-hectare reserve protected for geological features associated with ancient Lake Wisconsin. Its key feature is a well-preserved dual sequence of varved clay.
Shallow River is one of the most specialized Ontario park pages in this batch. Ontario Parks says geologists will be most interested in the deposit, where the Barlow-Ojibway Formation sits below the entire Frederickhouse and Connaught Formation.
The official page explains that varved clay consists of alternating light and dark sediment layers deposited annually by a lake. Those stripes can be counted to reveal the age of the deposit, similar to tree rings.
There are no visitor facilities. That makes Shallow River less of a recreation stop and more of a protected scientific feature that requires careful, low-impact planning and respect for reserve rules.
The tiny scale makes a confirmed access plan essential, and it makes casual off-route exploring a poor fit for any visit.
Plan around geology research, map review, nature reserve context, careful observation where access is appropriate, photography without disturbing deposits, and learning how varved clay records ancient lake history.
The park is very small, so access details and protections matter more than activity variety.
Confirm access, no-facility limitations, scientific-feature protections, maps, alerts, road conditions, weather, communications, and emergency planning through Ontario Parks before travelling.
Non-operating park in Ontario Parks locator.
