"2-3 May: 'Severn Across' 407 km Audax
The next hurdle: my first '400'. Arguably the most difficult distance because the time limit of 27 hours and the usual 6am start does not really allow for a proper rest. Off to a good start as I rode the first three hours in a nice bunch at a faster average than usual - about 27kph to the first control at Woodstock. Then it was through the Cotswolds to Tewkesbury for lunch, before tackling the climbs of the Forest of Dean. Turnaround at Chepstow to cross the Severn for a night ride back to Chalfont St Peter. Benign weather conditions, and a slightly flatter profile than the similar course on 'The Dean' meant I was through 300 km in 15 hours which was pleasing. The last section was more of a struggle as I made few tactical errors, including stopping for too long at the Membury Services control and going off course in the dark lanes approaching Henley. Arrived back at first light in Chalfont St Peter, where I was amazed to find that while 20 riders finished ahead of me, there were another 14 behind. Two hours kip on the floor of the community centre, and then the first train back to London - exhausted but elated." http://www.cyclingcouncillor.com/index.asp?PageID=159
Severn Across in April (ask Greenbank for tips)
http://willesdencc.blogspot.com/2010/01/audax-400-km-severn-across.html
http://www.bikely.com/maps/bike-path/Severn-Across-Audax-2009
"2-3 May: 'Severn Across' 407 km Audax
The next hurdle: my first '400'. Arguably the most difficult distance because the time limit of 27 hours and the usual 6am start does not really allow for a proper rest. Off to a good start as I rode the first three hours in a nice bunch at a faster average than usual - about 27kph to the first control at Woodstock. Then it was through the Cotswolds to Tewkesbury for lunch, before tackling the climbs of the Forest of Dean. Turnaround at Chepstow to cross the Severn for a night ride back to Chalfont St Peter. Benign weather conditions, and a slightly flatter profile than the similar course on 'The Dean' meant I was through 300 km in 15 hours which was pleasing. The last section was more of a struggle as I made few tactical errors, including stopping for too long at the Membury Services control and going off course in the dark lanes approaching Henley. Arrived back at first light in Chalfont St Peter, where I was amazed to find that while 20 riders finished ahead of me, there were another 14 behind. Two hours kip on the floor of the community centre, and then the first train back to London - exhausted but elated."
http://www.cyclingcouncillor.com/index.asp?PageID=159