The announcement comes more than a year after the Dallas-based breast cancer organization experienced intense backlash after its decision to stop giving grants to Planned Parenthood for breast screenings was made public. The funding was restored days later.
Komen said this week that seven of its 3-day races will not return next year. It says "economic uncertainty" has affected participation levels, which have dropped 37 percent over the past four years.
Participants must raise at least $2,300 to walk 60 miles over three days.
The cancelled races are in Boston, Chicago, Cleveland, Phoenix, San Francisco, Tampa Bay and Washington D.C.
