This Overland to Big Bear route starts at the Mill Creek Ranger Station at the corner of Highway 38 and Bryant Street in Mentone, CA. It winds through Thomas Hunting Grounds, the upper Santa Ana River gorge, and over Wildhorse Meadows into Big Bear. The route file can also be viewed directly in the ONX Off-Road app (subscription required) by Clicking Here. This is Route B. Route A uses Alder Creek and Clark's Grade. The two together make a complete loop from the valley up to Big Bear and back.