609 in 2015 and later

648 past in 2015 (updated 17-07-'15)

F3 Events - Royal Windsor River Swim 2015, Great Britain

Date: 
Sunday, 7 June, 2015 - 07:45

50m swimmers will start @ 7:45am.
1.5km swimmers will start @ 8:00am.
3.0km & 3.8km swimmers will start @ 8:15am.

http://www.f3events.co.uk/royal-windsor-river-swim-june-2015/general/the-royal-windsor-river-swim