Williston Lake Reservoir
Large reservoir in British Columbia created by a dam
Williston Lake in northeastern British Columbia is Canada's largest reservoir, formed by the WAC Bennett Dam; anglers, boaters and industry visitors access remote camps via logging roads.
Williston Lake at a Glance#
About Williston Lake#
Williston Lake is a large reservoir in northern British Columbia created by the construction of the W.A.C. Bennett Dam on the Peace River. Completed in the late 1960s, the dam flooded a large river valley to form the reservoir, which is used for hydroelectric generation.
The lake extends through a remote, forested landscape with numerous arms and inlets following the flooded river system; it is an important part of British Columbia’s hydroelectric infrastructure and regional ecology. Navigation, forestry access roads and a small number of communities and lodges occur along the shoreline.
Williston Lake was formed when the W.A.C. Bennett Dam was completed in 1968; the creation of the reservoir submerged valleys and altered local settlement patterns and ecosystems. It remains a working hydroelectric reservoir managed for power generation and flood control.
The reservoir lies in the northern interior of British Columbia, in a sparsely populated region of forests and mountains west of the Alberta border.
- Access and services: The reservoir was created by flooding river valleys and has a highly irregular shoreline; boat access and remote lodges exist but services are sparse in many reaches.
How to Get to Williston Lake#
Williston Lake is accessible by road from northern British Columbia communities such as Fort St. John and Prince George; distances are long and services sparse. Plan fuel, supplies and check local conditions before traveling.
Tips for Visiting Williston Lake#
- Plan longer stays to explore side arms of the reservoir by kayak; the lake's size rewards time on the water.
- Be bear-aware: the surrounding wilderness is habitat for black bears and other wildlife; follow local guidance and food-storage rules.
Best Time to Visit Williston Lake#
Summer is the main season for recreation; check seasonal road conditions and wildlife advisories.
Weather & Climate near Williston Lake#
Williston Lake's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with cool summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -17°C to 21°C. Moderate rainfall (519 mm/year).
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | - | -17° - -8° | -17° | 43 mm | - | - | 1.5 m/s | - | - |
| February | - | -14° - -4° | -12° | 33 mm | - | - | 1.7 m/s | - | - |
| March | - | -10° - 2° | -7° | 29 mm | - | - | 1.9 m/s | - | - |
| April | - | -4° - 9° | 1° | 19 mm | - | - | 2.1 m/s | - | - |
| May | - | 1° - 15° | 7° | 43 mm | - | - | 2.1 m/s | - | - |
| June | - | 6° - 19° | 12° | 60 mm | - | - | 2.0 m/s | - | - |
| July | - | 9° - 21° | 15° | 65 mm | - | - | 1.9 m/s | - | - |
| August | - | 8° - 21° | 14° | 51 mm | - | - | 1.7 m/s | - | - |
| September | - | 4° - 16° | 9° | 45 mm | - | - | 1.8 m/s | - | - |
| October | - | 0° - 8° | 3° | 45 mm | - | - | 1.9 m/s | - | - |
| November | - | -7° - 0° | -6° | 43 mm | - | - | 1.7 m/s | - | - |
| December | - | -13° - -5° | -12° | 43 mm | - | - | 1.6 m/s | - | - |