Cattle Run Proposers Day Announcement

Background
The Defense Advanced Research Projects Agency (DARPA) is hosting a Proposers Day for the Cattle Run program, aimed at enabling cost-effective cislunar constellations through the development and demonstration of autonomous spacecraft utilizing renewable propulsion.

The event will take place on November 10, 2026, at the DARPA Conference Center in Arlington, VA. The purpose of this conference is to provide information about the Cattle Run program, facilitate discussions, address questions from potential proposers, and create opportunities for teaming among participants.

Work Details
The Cattle Run program focuses on developing and demonstrating autonomous spacecraft that leverage renewable propulsion for persistent cislunar access.

Phase 1 involves the rapid development and launch of a Demonstrator spacecraft within 18 months to validate renewable propulsion capabilities for acceleration, vehicle control, and autonomous navigation. The objective is to collect on-orbit data to prove performance metrics related to renewable propulsion. Phase 2 aims to create multiple spacecraft to demonstrate sustained operations in cislunar space.

Place of Performance
DARPA Conference Center, 675 North Randolph Street, Arlington, VA 22203; additional work may occur in cislunar space.

Bidder Requirements
All attendees must be U.S. Citizens; no foreign nationals are permitted. Participants are required to present government-issued photo identification upon entry and submit a U.S. Citizenship Verification form during registration.

Additionally, attendees must meet Cybersecurity Maturity Model Certification (CMMC) Level 2 requirements and provide their CMMC Unique Identifier (UID) when registering.