. While newer versions (like 6.6 or 2025 alpha) are available, version 6.0 is archived on the same downloads page for those who need it. Hydrologic Engineering Center (.mil) The Digital River: A Story of Data and Flow
Follow the on-screen setup prompts, accept the terms, and choose your installation directory.
No license key required – HEC‑RAS is free public-domain software.
🌟 : If you are looking for the absolute latest version, HEC frequently releases newer versions (like 6.6 or 6.7 beta) which can be found on the same downloads page.
