The overall world best time for men was set by Jacob Kiplimo en route the Lisbon Half Marathon.
Excluding en route times both the world best for men and women were set at the Zevenheuvelenloop in Nijmegen, Netherlands.
The world best for men is held by Joshua Cheptegei of Uganda who ran a time of 41:05.
[1] The women's world best is held by Letesenbet Gidey of Ethiopia who ran a time of 44:20.
[2] Between 1985 and 1991, the IAAF World Women's Road Race Championships was contested over the 15 km distance.