North of Harrison Hot Springs, Harrison lake is one of the biggest around the lower mainland of British Columbia. The area around Harrison Lake is one of the most beautiful around. A forest service road that runs East of Harrison lake provides some great views of Harrison lake photos, as well as other interesting sites along the way. Harrison Lake is about 60 kms long and about 9 kms wide in some areas. With a depth of about 279 meters, Harrison lake is quite a deep mountain lake.