Pink Lake Trail

Pink Lake is one of the geological oddities of the Ottawa-Gatineau region — a meromictic lake, meaning its water layers never mix. In a normal lake, seasonal temperature changes cause the water to turn over, blending oxygen and nutrients from top to bottom. Pink Lake's layers remain permanently stratified, a condition so rare that fewer than a hundred such lakes are documented worldwide. The result is a lake whose colour shifts between turquoise, emerald, and jade depending on the light, the season, and the algae living in its distinct water layers.

The name is misleading — the lake isn't pink. The Pink family settled near its shores in the 1800s, and the name stuck. What the lake actually is, when you see it from the lookout platform above, is an improbable gem of colour set in a bowl of Precambrian Shield rock and mixed forest. The turquoise-green hue, caused by dissolved minerals and the particular way light interacts with the stratified layers, doesn't look like any other body of water in the region.

The trail is a 2.5-kilometre loop that starts from the parking area on Gatineau Park Parkway. It's moderately easy — some gentle elevation gain through hardwood forest before arriving at the cliff-edge lookout platform where the full lake reveals itself below. The descent to the lakeshore is steeper and rockier but manageable for anyone in reasonable fitness. Interpretive panels along the route explain the lake's unusual science in accessible terms.

Swimming and any water contact are strictly prohibited. This isn't a suggestion — the lake's rare meromictic properties are genuinely threatened by disturbance, and Parks Canada enforces the rule. The bottom layers of the lake are anoxic (no oxygen) and harbour bacteria that have been evolving in isolation for thousands of years.

The surrounding forest is beautiful Canadian Shield country: exposed granite, birch, maple, and the kind of mossy understory that smells like rain even when it hasn't rained. In autumn, the forest canopy turns flame-coloured above the green lake, creating a contrast that draws photographers from across the region.