No special access issues
NEVER PARK ON THE GRAVELLED ROAD IN FRONT OF THE CRAG OR AT THE PARKING LOT IN FRONT OF THE GARAGE!
Do not climb at the crag when there are grazing animals in front of it (that happens a couple of times every year).
Check even https://access.bergsport.se/tjornbroklippan/.
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From Göteborg take motorway E6 northwards. Leave the motorway at exit 90, Stora Högamotet (signs for Tjörn/Orust/Stenungsund) and follow road 160. Follow this road over the big bridge and continue for some kilometres until you’ll see the crag on the right (at the bus stop, about 2 km after the traffic lights after the bridge). DO NOT TURN RIGHT ONTO THE GRAVELLED ROAD. Instead, turn left and park in front of the fire tunnel (do not block any road).
The drive is about 50 km.
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From the car park follow the gravelled road through the tunnel under road 160 and you’ll arrive at the crag after some minutes.