The marathon and half - marathon courses have been established .
The marathon and half - marathon courses have been approved by Swiss Athletics and the IAAF , with the 26.2 - mile event this year taking place for the first time as an IAAF Bronze Label race .
The marathon and half - marathon courses have been established and approved by Swiss Athletics and the IAAF , with the 26.2 - mile event this year taking place for the first time as an IAAF Bronze Label race .