Two rockfall incidents cause boulders to fall on popular hiking trail in British Columbia
The closure of the Stawamus Chief main trail was initially due to what was believed to be a single rockfall event. However, further inspection revealed that there were actually two distinct slides. The first of these incidents occurred at around 10:30 p.m. on December 26, followed by the second slide on December 29 around 11 p.m. The assessment confirmed that multiple large rocks measuring approximately three to four meters in diameter broke loose, crashing through trees and displacing soil onto the trail.
As an avid hiker in the area, Nathan Romanin witnessed the aftermath of the rockfall on the Stawamus Chief Trail. The geoscientist Pierre Friele, a Squamish resident with three decades of experience working in the region, explained that the rockfalls were likely triggered by a freeze-thaw cycle. This cycle involves fluctuating temperatures that can cause rocks to become dislodged and fall. Friele noted that predicting such events is challenging, and he anticipates that more rockfalls may occur in the future due to these environmental conditions.
The presence of regular rockfalls in the area since 2021 indicates a concerning trend. Friele suggested that this uptick in rockfalls could be linked to climate change, as more intense weather patterns, including prolonged and heavy rainfall, could destabilize rock formations. Friele emphasized the importance of caution, especially as the closure of the Stawamus Chief main trail remains in effect until the area is deemed safe for public access.
After the recent rockfall incidents, access to the area has been restricted to protect the safety of hikers and visitors. The closure is indefinite, with no clear timeline established for the cleanup process. Essential steps include rock removal, clearing fallen trees, addressing unstable trees, soil removal, and repairing damaged infrastructure. Before the trail is reopened, extensive rock-scaling activities will be conducted to secure the area and prevent further rockfalls.
The closure of the Stawamus Chief main trail highlights the potential hazards associated with hiking in mountainous regions prone to rockfalls. Public safety remains a top priority as officials work diligently to assess the area and mitigate risks before allowing access once again.