A chemical mosaic
Spotted Lake is a saline endorheic alkali lake, a landlocked body of water with no outflow. Water, primarily from underground springs and snowmelt, only exits through evaporation. During the hot, dry summers of the Okanagan Valley, this evaporation process concentrates a dense collection of minerals. The lake contains high levels of magnesium sulfate (Epsom salts), calcium, and sodium sulphates. It also has smaller but significant amounts of eight other minerals, including silver and titanium.
As the water level drops, these concentrated minerals crystallize, forming hundreds of distinct pools. The hardened mineral deposits create natural walkways between the circles. The color of each pool—ranging from green and blue to yellow—is determined by its specific mineral composition. Magnesium sulfate, in particular, is a primary contributor to the spots' coloration as it crystallizes. The lake itself is small, measuring approximately 0.7 kilometers in length and 0.25 kilometers in width.
A sacred landscape reclaimed
To the Syilx people of the Okanagan Nation, this place is known as kłlilx’w (Kliluk). For centuries, it has been a sacred site, with traditional knowledge holding that each of the distinct pools possesses unique healing properties. Ceremonial cairns, many now ancient and partially buried, surround the lake and show its long history for healing.
For 40 years in the mid-20th century, the lake was under private ownership. In 1979, the owners attempted to develop a commercial spa at the site. This prompted a decades-long effort by the Syilx Okanagan Nation to reclaim the sacred land. In October 2001, this effort succeeded when the Okanagan Nation, in partnership with the Canadian government's Indian Affairs Department, purchased 22 hectares (54 acres) of land, including the lake, for $720,000. This purchase ensures the protection of the site from development, preserving it for future generations of the Syilx people.