New water activity restrictions in the Rocky Mountains are underscoring the risk of whirling disease spreading into connected watersheds, including those in the East Kootenay.
Starting Monday, May 4, 2026, the use of watercraft and wading gear will be prohibited in all lakes, rivers and creeks within Mount Robson Park. The move aims to prevent the spread of whirling disease into the Fraser River watershed, but officials say the broader concern extends across the region.
The restrictions apply to motorized and non-motorized boats, such as canoes, kayaks and paddleboards, along with waders and boots typically used for fishing. Swimming and shore fishing with clean gear will still be allowed.
Whirling disease, caused by a microscopic parasite, affects trout, salmon and whitefish by attacking their nervous systems and causing erratic swimming behaviour. The disease can spread through contaminated water, mud, fish and equipment.
While not harmful to humans, it can cause significant fish mortality and threaten fisheries.
The disease has already been confirmed in several locations closer to the East Kootenay, including Kootenay Lake and Yoho National Park, raising concerns about its potential spread through interconnected waterways.
B.C. monitors priority waterbodies in the Columbia River watershed, which includes much of the East Kootenay, in partnership with First Nations and the federal government. So far, whirling disease has not been detected in Mount Robson Park.
Parks officials say prevention remains the best defence, urging anglers and boaters to follow Clean, Drain, Dry practices and comply with B.C.’s Pull the Plug law when transporting watercraft.
Given the connection between regional watersheds, officials warn that if the disease spreads further, it could affect fish populations, ecosystems and recreational fishing opportunities throughout the East Kootenay and beyond.
