Half Marathon October 2025. The chelmsford marathon & half marathon on 12 october 2025 is one of the biggest running events in essex and is a major fundraising event for havens hospices. Browse through running races in october 2024 2025 half marathons ️27 different sports ️biggest race calendar ️races from over 184 countries

Check out our list of october 2025 half marathons below. There are many great marathons in europe, including london, athens, berlin marathons.