The place to access the valley when I was a kid was the Merrick Orchard parking lot at that same spot. Hay rides, outdoor centre building drop-in, apple picking. HCA tore down the bldg there because the road was too expensive to maintain. Oddly they kept Maplewood even though Artaban was a much more expensive road to maintain. So its back to the future (minus the bldg and apples).
Where exactly is it? Does mark have a map?