Brooklyn Half Marathon 2025 Sign Up Process. On april 27th, 2025, over 20,000 runners will complete a remarkable running journey at the. On april 27th, 2025, over 25,000 runners will complete a remarkable running journey at the.

Registration for the 2025 nycruns brooklyn half marathon is now open! Apply or claim your guaranteed entry to the 2025 rbc brooklyn half, set for.