From Toronto (1.5 hours North of the GTA):

Take 401 E/W to 400 North, towards Barrie. When leaving Barrie, pay attention to the road signs on your right. Take the ramp on your right towards Parry Sound. Follow 400N for 30 minutes to Exit #156. Turn off at Exit #156, and at the stop sign turn right onto Port Severn Road North. We are 500m down this road on the left - can't miss us

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From the North:

Take Hwy 400 south to Exit 156. At stop sign turn left. Follow Port Severn Road to stop sign. Go through stop sign and we are 500 meters from there on the left.