This was part of the Timberline email newsletter. I haven't seen it on the web site. I also don't know if it works in the other directsion (Wisp to T-Line).

"Wisp and Timberline Cross-over promotion!
Timberline is delighted to announce our special for 2006-2007 Timberline Season Pass holders with the Wisp Resort in Maryland. Every Thursday (Except 12/28/06) ski the Wisp for only $15.00 for an extended day ticket or only $10.00 for a night ticket from 5 - 9 pm. Just show your Timberline Season Pass at their lift ticket window for this great savings. *Not valid with any other promotion, must be a valid season pass holder and present pass at time of purchase, no copies, only one ticket sold per pass."

Clay