Description: Columbia Plateau style petroglyphs are found in abundance in Cascadia Cave—a large rockshelter on the South Santiam River, which drains the west slope of the Cascade Range. Images include many geometrics, dozens of bear paws, small faces, and vulvaforms and a penisform. The shape of the rockshelter itself also plays a part in the interpretation of the art here.Access: The trip is MODERATELY DIFFICULT. The trail to Cascadia Cave requires a hike of approximately 2.5 miles round trip over mostly level terrain through old-growth Cascade forest. One small stream crossing is required, and footing is somewhat tricky at this part of the trail. June trail conditions could be quite muddy, so appropriate footgear is required. At the end of the trail a slight uphill climb of about 20 feet elevation gain is necessary.