City 2 Surf
Annual fourteen kilometer race in Sydney, Australia that has had more then 60,000 participants.
Bridge to Brisbane
Brisbane, Australia 30 August 2009 10 km 45,265 
Vancouver Sun Run
Ten kilometer April event in Vancouver, British Columbia, Canada that has had as many as 60,000 participants.
April marathon in Paris, France that has attracted as many as 30,000 participants.
Frankfurt Corporate Challenge
The Frankfurt stop on the JP Morgan Chase Corporate Challenge racing series is a 5+ kilometer event that has attracted as many as 65,000 participants.
September marathon in Berlin, Germany with more that has had more then 35,000 participants.
Tokyo International Marathon
This Tokyo, Japan marathon has had more then 30,000 participants.
December marathon in Okinawa Japan that has attracted more then 20,000 participants.
Seoul International Marathon
South Korean marathon in the city of Seoul with as many as 21,000 participants.
KwaZulu-Natal Province, Republic of South Africa 16 June 2000 87.6 km 20,047
Cursa El Corte Ingles
Annual eleven kilometer running race in Barcelona, Spain that has had more then 100,000 participants.
Gothenberg Laps (GöteborgsVarvet)
This half marathon race in Gothenburg, Sweden usually takes place in May and it has had more then 53,000 participants.
Great North Run
Half marathon running event in Newcastle, United Kingdom that has had as many as 54,000 participants. Usually takes place in September.
Virgin London Marathon
London, United Kingdom 25 April 2010 Marathon 36,523
Bay to Breakers
This 12 kilometer point-to-point race in San Francisco, Northern California is famous for being the longest consecutively run foot race in the world, for being one of the largest (up to 110,000 runners), and for some of the participants running in various states of undress, and for its wild and wacky character. For more about the event see the official Bay to Breakers Web site and the February 2009 San Francisco Chronicle article
Los Angeles Marathon
This Southern California marathon has had as many as 21,000 runners.
Bolder Boulder 10K
Ten kilometer race in Boulder Colorado that has had as many as 54,000 participants. The first Boulder to Boulder race took place 1979. It takes place every year, near the end of May, on the United States Memorial Day Holiday
Peachtree Road Race
Ten kilometer race in Atlanta, Georgia with as many as 50,000 participants. The Atlanta Peachtree Road Race takes place every year on the 4th of July, which is United States Independence Day.
Annual marathon in Honolulu Oahu Island, Hawaii with as many as 26,000 participants.
Chicago, Illinois Marathon that has had more then 33,000 participants.
500 Festival Mini-Marathon
Annual half marathon in Indianapolis, Indiana with as many as 35,000 participants.
Annual marathon in Boston, Massachusetts that has had as many as 35,000 participants. Usually takes place in April.
New York City Marathon
The New York City Marathon usually takes place in November and it has had as many as 43,000 participants.
Cooper River Bridge Run
Charleston, South Carolina ten kilometer race with up to 33,000 participants.
Monument Avenue 10K
Ten kilometer race in Richmond, Virginia with as many as 37,000 participants.
Marine Corps Marathon
This Washington DC marathon has had up to 20,000 participants. Usually takes place in October.
Lilac Bloomsday Run
Annual twelve kilometer running event that takes place every May in Spokane, Washington State. The run has attracted as many as 61,000 participants.