Super easy approach to the upper trail boulders, lower trail boulders may involve some second/third class scrambles to approach.

From the upper parking lot, head down the grindstone trail. After approximately 1/3 of a mile, take a left onto the trail that leads to 3 bears gully. Rather than continuing down 3 bears gully to the main climbing areas, take a right on a trail that parallels the top of the cliff line. This follows the old route of the grindstone trail. From here, follow the obvious remnants of the trail for a few hundred meters and the trailside boulder will be on your left.