Awards Structure

Randonneur Series
Brevet Series
Randonneur Round the Year
International Super Randonneur

Audax UK offers various awards designed to encourage cyclists to ride more events and longer distances.
AUK recognises certain set distances - 50km, 100km and 150km are introductory rides known as Populaires. 100km is just over 62 miles.
200km, 300km, 400km and 600km are the 'classic' recognised distances, to be ridden in a time equivalent to a minimum average speed of around 15kph. Thus the maximum time allowance for a 200 will be around 13 hours, for a 600, 40 hours.
Beyond this there are events of 1000km and above, which for many riders would be the culmination of a long season of preparation.
The 'Randonneur Series'
These three awards stretch the rider to longer events.
Randonneur 500. By riding Populaire events of 50, 100 and 150km then going on to a 200km at Randonneur speed (ie, 200km or 125 miles in a maximum time of around 13 hours), all in one season, you can become a Randonneur 500.
Randonneur 1000. If you think you can stretch to 300km, you should instead be aiming for a 100, 200 and 300km all at Randonneur speed, topped up by more events totalling another 400km, all in one season, which will make you a Randonneur 1000. So, a 100, 200, 300 and 400 would be OK - so would a 100, 3x200s, and a 300. Note that on a 300km event, there will almost certainly be a few hours of night-riding, and good cycle lighting is essential.
Super Randonneur. Audax UK's traditional award for the top 10% of hardened night-riders. Ride a series of 200, 300, 400 & 600km all in one season. Longer events can substitute for shorter - eg, 2x400 plus 2x600 is also counted as an SR series. AUK have a smart new presentation SR medal, based on a design by Jaques Dorleans.
Super Randonneur 2000. To celebrate the Millennium, a new award exists. To the Super Randonneur series as described above, add a 500km ride to gain the SR2000 and the free SR2000 medal.
Only a series of 200, 300, 400, 500, 600 will count - no other combination is valid.
Progressing past the SR, the new Randonneur 5000 is awarded to a person riding randonneur events totalling 5,000km in one season. Note that you can gain the Randonneur 5000 without riding the longer distances - a 200km every weekend through the spring and summer would do it.
Similarly, the new Randonneur 10000 is awarded to a person riding randonneur events totalling 10,000km in one season.
SR medal
The 'Brevet Series'
These awards encourage the rider to keep riding over several years.
Brevet 500. Ride 5 x 100km rides in one AUK season to gain your Brevet 500. 150s can be counted as well - but not 200s.
Brevet 1000. Ride 5 more over subsequent seasons, totalling 10 in all over any time period, and you will have gained a Brevet 1000.
Another way to gain the Brevet 1000 is to ride 5 x 200km in one season. But you can't mix the two, it has to be 10 x 100 or 5 x 200, and you can't use 300s as substitutes.
Brevet 2000. Carry on collecting 100s or 200s over as long a period as you like, and eventually you will have your Brevet 2000. That's 10 x 200km or 20 x 100km. Remember, you can't mix them, and you can't substitute longer rides.
Brevet 3000. If you have ridden any mixture of 100, 150 and 200km over a long period (and it will be a long period!), totalling 3000km, then you have your Brevet 3000.
Brevet 4000. This is for riders who can show they have ridden 20 x 200km over any length of time.
Brevet 5000. This is a major challenge which is achieved only by very experienced randonneurs. In a four-year period, ride an End-to-End OR a Paris-Brest-Paris, a 200, 300, 400, 600 and 1000, a 24 hour team event, plus other rides to top up to 5000km.
Brevet 25000. Only a handful of randonneurs have ever achieved this. In a six-year period, a Paris-Brest-Paris OR London-Edinburgh-London, another ride over 1200km, a 1000km, a 24 hour team ride, three Super-Randonneur series, and other rides to top up to 25000km! Phew!
Brevet 1000 medal