Susan G. Komen Foundation cancelling some races for 2014

(CNN) -- The Susan G. Komen Foundation is cancelling some of its signature races because of a drop in donations.

This year's races will go on as planned.

However, three day races in Boston, Tampa Bay, Chicago, Cleveland, San Francisco, Arizona and Washington, D.C. won't be held in 2014.

Some supporters pulled their money from the group after it tried to cut its funding for Planned Parenthood.