Permanents
From the RUSA Website:
What is a Permanent? A Permanent is like a brevet but you can arrange to ride it any time, not just on one specific date established by the organizer. Like brevets, routes can start and finish in the same location, but they can also run point-to-point, and can be any distance of 200km+ (100-199km for a Permanent Populaire). You must be a RUSA member to ride a Permanent (or a member of another ACP-affiliated country organization.) A Permanent may be ridden alone or with a group.
Credit and Awards - Permanent rides in the US are validated by RUSA; therefore, they do not count toward any ACP awards nor do they serve as qualifiers for PBP or other foreign events, such as RM 1200k's. However, a Permanent counts toward RUSA's annual distance award and R-12 award. (Permanent Populaires count toward the RUSA P-12 award as well as toward RUSA's annual distance awards.) A Permanent may serve as a qualifier for a US-based 1200km randonnée or other event at the discretion of the event organizer.
Fellow Montana Randonneur, Karel Stroethoff, and myself are starting to develop a nice inventory of Permanent routes:
Karel owns the following Permanents. To ride one, contact Karel at his email address: karel dot stroethoff at gmail dot com
I own the following Permanents. For more details, ride reports from these routes, and how to register, visit my Rando Montana Blog.
Hollowtop 200 (203K)
Search for Plummer's Gold (237K)
Martinsdale Mail Run (300K)
Beartooth Pass (207K)
Hilly Hyalite (101K)
Yellowstone National Park South Loop (204K)