Race guides / Big fields and the Majors

The biggest half marathons.

Half marathons ranked by how many runners finished the last edition. The largest halves draw bigger fields than most marathons, and their entry often opens and closes months before race day. The top 30 of 154 half marathons in 13 countries, racing from 7 Nov 2026 to 17 Oct 2027. The biggest, Great North Run, had 57,000 finishers last time.