Now in its 11th year, [the Dun Run is a] 200km July moonlight ride [that] runs from London Fields Park in Hackney to Dunwich on the Suffolk coast. Initially a limited pay to ride event, the affectionately named "Dun Run" is now a free for all, with over 1,000 attendees last year. The course is mostly smooth tarmac, meaning all shapes and sizes of bikes are to be seen riding in the moonlight including, somewhat unbelievably, a penny farthing.
I completely agree with Reg.
Critical Mass ...has its origins in San Francisco in 1992
a varied often off-road route in the small village of Rutland