See http://www.nmbmwmc.org/sipapu.htm for details.
This is about 30 minutes South of Taos. Great rally. Primarily BMW but other makes invited as well. A few details from their site:
The Sipapu ski area is located about 25 miles southeast of Taos on NM 518. Our rally officially begins on Friday morning and ends on Sunday. However, many attendees have been extending the rally by arriving earlier in the week. Superb camping sites are available on-site. Dorm room bunks are also available free of charge on a first come, first served basis for Friday and Saturday night. If you arrive earlier in the week or stay later you are required to pay a fee. The Sipapu ski area offers motel type accommodations for the rally that are usually booked by June. However, cancellations do occur and a call to the lodge is recommended. Other camping, cabins and motel services are located in the area. The town of Taos offers all the national chain motels.