A friend of a friend said this about the cave: The upper cave 1.5 miles long and takes about 3 hours to complete. There is a lot of climbing over rocks and debris involved. The caves stay at a year round temp of about 42-50 degrees. This time of year (March/April) with all the run off and snow melt there will be standing water and some flooding
Driving directions to the cave:
From Interstate 5 -- take Exit 21 (Woodland Exit)
Travel east on Highway 503 and USFS Road 90, approximately 35.7 miles to junction of USFS Roads 83 and 90.
Turn north (left) onto USFS Road 83 and proceed another 2 miles to the junction of USFS Roads 83 and 8303.
Turn west (left) onto USFS Road 8303 and proceed 0.2 miles to Trail of Two Forests.
From Trail of Two Forests - proceed another mile on USFS Road 8303 to parking lot of lower entrance to Ape Cave.
Visited on a partly cloudy day (in October) ... biked around, crawled up to edge of the cliffs on my belly for the best view of the crashing waves ... very memorable.