41-year-old Kastor clocks 1:09:36 to finish third at the Rock ‘n’ Roll Philadelphia Half Marathon; Karoki completes personal best - PHILADELPHIA – (Sept. 21, 2014) – Nothing appears to be stopping American distance-running ace Deena Kastor. The 41-year-old Olympic bronze medalist and American marathon-record holder added another mark to her impressive and extensive resume this weekend: the Masters world record in the half marathon. Kastor, who lives and trains in Mammoth Lakes, Calif., clocked 1 hour, 9 minutes and 36 seconds to finish third at the Rock ‘n’ Roll Philadelphia Half Marathon on Sunday morning
Along the way, Kastor also set three more Masters world records at 15K (49:03), 10 miles (52:41) and 20K (1:05:52). She also broke her own American Masters half-marathon record of 1:11:38.
Her showing was a 20-second improvement over the previous world best set by Russia’s Irina Permitina in 2008.