A North Shore zero access sport crag! Has a number of cool little lines, including a great little 24 that busts through the roof! To get to the crag, park on the left at the corner of Shirley Rd and Valleyview Close in Roseville and find a faint track between number 130 and a light pole.  Down past a boulder on your left, then veer right then back left to the top of the cliff (you'll come out directly above Thunderbird).  At this point you're still no more than 100m from the houses! Descend to the right (chopped steps, boulder scramble). Apparently some mid ranged bouldering off to the right (not checked) or bash over to the left or find the faint track amongst the undergrowth to find yourself underneath the big overhang. Thunderbird starts here.   The crag is within the Lane Cove National Park. Climbs described left to right.