Okay, trinkets might not be the only reason we ride, but they're up there.
As usual, more details may be found at RUSA.
Super Randonneur - Complete a set of ACP sanctioned brevets in a single season: 200k, 300k, 400k, 600k
Rouleur Award - Complete populaires of 100-124k, 125-149k, 150-199k, a Dart populaire, and a 200-220km brevet within a calendar year
P-12 Award - Complete a populaire (of < 200k) in each of 12 consecutive months
R-12 Award - Complete a ride of 200k or more in each of 12 consecutive months
K-Hound - Ride 10,000k in RUSA events and permanents, PBP, or RM-sanctioned 1200k+ events within a calendar year
RUSA Cup - Complete at least one of each type of RUSA event (Populaire, 200k, 300k, 400k, 600k, 1000k brevets, 1200k+ grand randonnee, RUSA team event), accumulating at least 5,000k over a two-year period
Randonneur 5000 - Complete Paris-Brest-Paris, a Super Randonneur series (200k, 300k, 400k, 600k), a 1,000k brevet, and a Flèche team event + other ACP sanctioned rides to reach 5,000k within a 4-year period
Randonneur 10000 - Complete Paris-Brest-Paris, another 1200k, two Super Randonneur series (200k, 300k, 400k, 600k), two 1,000k brevets, a Flèche team event, a Super Randonee 600 + other ACP sanctioned rides to reach 10,000k within a 6-year period
American Randonneur Challenge - Complete two or more 1200k+ events in a single season
Can-Am Challenge - Complete a Canadian and US 1200k or longer RM-sanctioned event during the same calendar year
Coast-to-Coast 1200km - Complete four different RUSA 1200km+ events over any number of years
American Explorer Award - Cover at least 10 different US states and territories on RUSA rides
Rando Scout Award - Ride at least 25 distinct event routes
Mondial Award - Ride 40,000k and multiples thereof in RUSA events
Galaxy Award - Ride 100,000k and multiples thereof in RUSA events