Critical Mass is an "organised coincidence", but tends to follow the same pattern each month:

- Main ride starts at 4pm from Gwanghwamun (full details via link below)
- Break at the Seoul Museum of History (assuming decent turnout)
- Finish in Yeouido at the riverside
... - Stand around in a circle and applaud (it's a Korean thing)

The ride is about 13km and goes at a slow pace. It's best if you're accustomed to riding on city roads, especially when the turnout is low.

*** ADDITIONAL RIVERSIDE MEETING POINT THIS MONTH ***
If you've been wondering how to get to the start of the main ride at Gwanghwamun with your bike, there is a solution. This month there will be an additional meeting point in Yeouido at 3pm. It's really easy to find from the riverside, see the Google map below.

A map of the key locations including the additional Yeouido starting point:

http://tinyurl.com/268fy9p

Please feel free to email [email protected] if you need additional directions.

The main ride starts at 4pm -- this is the meeting point, at the location of the marker: http://tinyurl.com/342b9wr

If you can get your bike onto a train, there are three nearby stations:
경복궁 / Gyeongbokgung on line 3
광화문 / Gwanghwamun on line 5
종각 / Jonggak on line 1 (actually, maybe City Hall 시청 is better)

View of the entrance to the area where the ride meets up:
http://tinyurl.com/34jfkqy

The ride starts at 4pm (or a bit later) and ends an hour or two later at the riverside in Yeouido.