Mount Slesse is located 1 hour east of Vancouver in the City of Chilliwack (Sardis). 

Getting to Mount Slesse is relatively simple:

Coming from the East (Hope, Kelowna, BC Interior)
Leave the freeway at Exit 119a for Sardis and follow Vedder Rd soutbound until you come to Watson Rd which is at a traffic lights junction.  Turn right on Watson Road and drive until you reach the roundabout. Take the third exit in the roundabout onto Tyson Road, Mt. Slesse Middle School is immediately on the right hand side.

Coming from the West (Vancouver, Surrey, Abbotsford)
Follow the Trans-Canada Highway/BC 1 east to Evans Rd (Exit 118) in Chilliwack.   Turn right onto Evans Rd and continue driving south to Tyson Rd, turn left onto Tyson Rd and continue on Tyson to the roundabout.  Take the 2nd exit in the roundabout to continue on Tyson, Mt. Slesse will be on your right hand side immediately after the roundabout.