I believe it was myself who met them on that trail. Neither of us were unfriendly, all exchanged names and greetings. I was also going to post here to clarify and now I know. I have seem the do not enter signs on trail exits at Sunder, but had not noticed the lack of do not enter on the trails, never really looked for them. Somewhere I picked up from someone or some post that Sunder was directional. My mistake and apologies. In actuality we met up again at the top of Rock Cut as I was checking out the lack of an enter or exit sign. No harm done and looking forward to riding what was "in reverse" for me next trip to SDP.