Hope Slide
The Hope Slide was a catastrophic landslide that occurred on January 9, 1965, in the Nicolum Valley near Hope, British Columbia. With an estimated volume of 47 million cubic metres of rock, it remains one of the two largest recorded landslides in Canadian history. The event destroyed a section of the Hope-Princeton Highway, claimed four lives, and dramatically reshaped the local landscape. Today, the site serves as a stark reminder of the power of natural forces and the importance of geological monitoring and emergency preparedness in mountainous regions.
The Morning of the Disaster
The events of January 9, 1965, began with a small avalanche in the early morning hours on the Hope-Princeton Highway below Johnson Peak. This initial slide forced five people in a 1959 Chevrolet convertible to stop on the icy, narrow road southeast of Hope. Norman Stephanishin, the driver of an Arrow Transfer oil tanker truck, came upon the stuck vehicle and stopped behind it. Unable to turn his large rig around, Stephanishin tried to convince the four occupants of the convertible to walk the five kilometres back to Sumallo Lodge for safety. When they refused, he set out on foot himself to call the British Columbia Department of Highways. Shortly after beginning his walk, Stephanishin flagged down a Greyhound bus driven by David Hughes, who was travelling to Vancouver. Hughes turned his bus around and returned with Stephanishin to Sumallo Lodge, a decision that ultimately saved his passengers from the impending catastrophe.
At approximately 6:58 am, the massive landslide was triggered, obliterating the southwestern slope of Johnson Peak. The slide completely displaced the ice and mud in Outram Lake with tremendous force, throwing it against the opposite side of the valley and stripping all vegetation down to bare rock. A torrent of 47 million cubic metres of pulverized rock, mud, and debris, reaching depths of 150 metres and widths of 2 kilometres, cascaded down the 1,200-metre mountainside. This deluge buried the stranded convertible, the Arrow Transfer tanker, and a loaded hay truck that had stopped behind it. The first news reports of the disaster were filed by morning news reporter Gerald Pash and news director Edgar Wilson of CHWK Radio in Chilliwack, who relayed voice reports to Broadcast News and The Canadian Press.
Casualties and Immediate Aftermath
Rescue workers from Hope and Princeton converged on the scene to search for survivors in the immense debris field. They recovered the body of Thomas Starchuck, a 39-year-old from Aldergrove who was driving the hay truck. The body of Bernie Lloyd Beck, the 27-year-old driver of the convertible from Penticton, was also found. Beck's two passengers, Dennis George Arlitt, 23, and Mary Kalmakoff, 21, both from the Penticton area, were never recovered from beneath the estimated 150 metres of rock and debris. The landslide had completely destroyed approximately 3.5 kilometres of the Hope-Princeton Highway, severing a critical transportation link through the Cascade Mountains.
Phil Gaglardi, the flamboyant British Columbia Minister of Highways, personally attended the scene to direct the emergency response. Under his direction, crews began constructing a temporary tote road over the southern portion of the massive slide to restore travel. This rough, bumpy route was established in just twenty-one days, providing a vital detour for traffic. The permanent solution involved a more significant engineering feat, rerouting the highway further away from the slide location. The new alignment was built 55 metres above the original ground level on the other side of the valley, traversing the base of the slide's debris field to avoid future risks.
Geological Causes and Triggers
The fundamental cause of the Hope Slide was the geological instability of Johnson Ridge. The southwestern slope was underlain by pre-existing tectonic structures, including faults and shear zones, which had weakened the rock mass over time. The lower parts of the eventual slide scar consisted of felsite sheets, while the upper parts were composed of highly jointed Paleozoic greenstone beds. Ongoing weathering and tectonic activity had gradually brought the slope to a state of limiting equilibrium, making a catastrophic failure possible. Johnson Peak had also been the site of a smaller prehistoric rockslide, indicating a history of instability in the area.
The specific trigger for the 1965 event remains a subject of analysis. Two seismic events were recorded in the area at 3:56 am and 6:58 am on the morning of the slide. Recent research suggests these were not earthquakes that triggered the landslide, but rather the seismic signature created by the impact of the slide mass against the opposite valley wall. Changes in groundwater pressure, a common landslide trigger, are not thought to have played a major role as the slide occurred during a period of sub-zero winter temperatures. Some theories suggest that the freezing of seepage exit points may have increased water pressure at the toe of the slide, contributing to the final collapse.
Long-Term Impact and Monitoring
The Hope Slide left a permanent scar on the landscape, a vast area of bare rock visible from the highway. Over time, vegetation including trees has begun to regrow over parts of the slide area. In 1967, recognizing the need for better environmental monitoring in the region, the Meteorological Branch of the Department of Transport established a weather station named Hope Slide near the rockslide deposit. This monitoring site has been moved twice since its inception, with the latest iteration, known as Hope Slide A, continuing to record hourly weather data as of October 2025. The site provides valuable information on local conditions, which can be critical for understanding landslide risks.
A dedicated rest area on Highway 3 now exists at the slide location, serving both as a memorial to the victims and a viewpoint for tourists. Visitors can observe the immense scar on the mountainside and reflect on the event's magnitude. The Hope Slide is frequently cited in geological studies and public safety discussions as a prime example of a large-scale landslide. Its legacy points to the importance of engineering resilience in infrastructure and the ongoing need to monitor changing weather and geological conditions in mountainous terrain to mitigate future disasters.
Hope and Landslide Risks in the Modern Era
The town of Hope, situated at the convergence of five major highways and both of Canada's main rail lines, remains acutely vulnerable to landslides and flooding due to its mountainous location and weather patterns. The community is accustomed to atmospheric river events, known locally as the pineapple express, which bring warm, moist air and heavy rain from the Pacific. A severe test of modern emergency preparedness came in November 2021, when an intense atmospheric river event triggered multiple landslides that isolated the town. More than 230 millimetres of rain fell in Hope, leading to slides that blocked or destroyed all road and rail connections in and out of the community.
For four days, from November 14 to 18, Hope was effectively cut off, trapping approximately 1,200 travellers and residents. The local emergency operations centre, initially hampered by power and internet outages, coordinated a massive relief effort. Key actions taken during the 2021 event included:
- Opening the local school to shelter nearly 750 people.
- Utilizing churches and private camps to house additional stranded individuals.
- Using the local arena as a walk-in cooler for food supplies airlifted in by the province.
- Managing unprecedented air traffic at the town's grass-runway airport for supply delivery and evacuations.
- Coordinating a one-time passenger train for 500 people to Vancouver after one rail line was cleared.
Comparative Landslide Data in Canada
The Hope Slide holds a singular place in Canadian history due to its immense scale. For decades, it was considered the largest recorded landslide in the country. It has since been joined in that category by the similarly sized 2010 landslide on Mount Meager in British Columbia. The table below compares key details of these major Canadian landslides.
The establishment of the Hope Slide weather station and its continued operation for over half a century highlights a long-term commitment to monitoring environmental conditions that can contribute to slope instability. Data from such stations are crucial for public safety warnings, especially given the increased frequency and intensity of precipitation events linked to climate change. The lessons from the 1965 disaster and more recent events continue to inform highway engineering, land-use planning, and emergency response protocols across British Columbia's rugged terrain. The Hope Slide's history provides a clear example of why such measures are necessary.
Questions about Hope Slide
How many people died in the Hope Slide?
The landslide killed four people. The victims were Thomas Starchuck, driver of a hay truck. Bernie Lloyd Beck, driver of a Chevrolet convertible. And Beck's two passengers, Dennis George Arlitt and Mary Kalmakoff. The bodies of Arlitt and Kalmakoff were never recovered from beneath the massive debris field, which was up to 150 metres deep in places.
What caused the Hope Slide?
The primary cause was geological instability due to pre-existing faults and shear zones within Johnson Ridge. The slope had been weakened by weathering and tectonic activity. The exact trigger is unclear, but it occurred during freezing winter temperatures. The seismic events recorded at the time are now believed to have been caused by the impact of the landslide itself, not by earthquakes that initiated it.
Where exactly did the Hope Slide happen?
The Hope Slide occurred in the Nicolum Valley in the Cascade Mountains near Hope, British Columbia, at coordinates 49°17′56″N 121°15′49″W. This location is approximately 150 kilometres east of Vancouver. The landslide obliterated the southwestern slope of Johnson Peak and buried a section of the Hope-Princeton Highway. The highway has since been rerouted further away from the slide location, around and over the base of the slide's debris field on the other side of the valley. A rest area on Highway 3 now provides a view of the massive scar.
Is there a memorial at the Hope Slide site?
Yes, there is a memorial at the Hope Slide site. A rest area for Highway 3 exists at the slide area, which includes a memorial dedicated to the victims. This rest area also features a viewpoint that allows tourists to view the extensive scar left on the mountainside. The memorial serves to remember the four people who lost their lives in the landslide on January 9, 1965. The site combines commemoration with public education about the geological event.
How big was the Hope Slide compared to other Canadian landslides?
The Hope Slide was enormous, with an estimated volume of 47 million cubic metres of rock and debris. It is definitively one of the two largest recorded landslides in Canada, along with the similarly sized 2010 Mount Meager landslide. This volume of material buried the valley floor under up to 150 metres of debris across a width of two kilometres. Its scale makes it a benchmark event for the study of major landslides in Canadian history.
How is the Hope Slide area monitored today?
The area is monitored by an official weather station. Beginning in 1967, the Meteorological Branch of the Department of Transport established a weather station named Hope Slide near the rockslide deposit. This monitoring site has been moved twice since its establishment. The latest station, designated Hope Slide A, continues to record hourly weather data as of October 2025, tracking local conditions for public and scientific use.
Sources and further reading
- Hope Slide (Wikipedia)
- Hope cut off: B.C. community mobilizes when landslides ... (firefightingincanada.com)
Checked by the Your Space Hamilton desk. Last updated 2026-10-24.
