Cattle Run Proposers Day Announcement

PROPOSERS DAY: DARPA is hosting a Proposers Day in support of DARPA-SN-27-03 Cattle Run program on Tuesday, November 10, 2026, at the DARPA Conference Center (675 North Randolph Street, Arlington, VA 22203) from 8:00am to 5:00pm EST. The purpose of this conference is to provide information on the Cattle Run program; promote additional discussion on this topic; address questions from potential proposers; and provide a forum for potential proposers to meet for teaming opportunities.

PROGRAM OBJECTIVE AND DESCRIPTION: The Defense Advanced Research Projects Agency (DARPA) Cattle Run program enables cost effective cislunar constellations by developing and demonstrating autonomous spacecraft that leverage renewable propulsion [EF1.1]for persistent cislunar access. Phase 1 develops and rapidly launches a[SK2.1] Demonstrator spacecraf[SK3.1]t in 18 months that shows the ability of renewable propulsion to achieve sufficient acceleration, accurate vehicle control, and autonomous navigation necessary for persistent cislunar access. The Phase 1 objective is to collect on-orbit data to prove the performance of the renewable propulsion approach including vehicle control and navigation data.

The Demonstrator spacecraft is launched below GEO and is agnostic of formfactor. Phase 2 creates multiple spacecraft and demonstrates persistent cislunar access.