From Montreal (50 min):

Take highway 15 North, exit 76 for Val-David/Val-Morin
Take road 117 North to Val-David
Turn right onto Rue de L'Eglise
Turn right onto Rue de la Sapiniere

From Ottawa (2 hours):

Take route 17 to Hawkesbury
then cross the bridge to Quebec
Take route 148 towards La Chute
Take highway 50 and exit for highway 15 North
Now continue by following the Montreal directions written above.