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HEC-RAS has been developed for the U.S. Army Corps of Engineers (USACE). However, software developed at the Hydrologic Engineering Center is made available to the public whenever appropriate. Use is not restricted and individuals outside of USACE may use the program without charge. HEC will not provide user assistance or support for this software to non-USACE users. Downloading this software indicates full acceptance of your responsibility in the use of this program. Please see the distribution policy for more details.

Current Version HEC-RAS 5.0.5:    

These setup package include HEC-RAS 5.0.5, Documentation, and optionally the Example Projects.

Primary Download Site:
Download HEC-RAS 5.0.5 Setup Package Documentation, and Example Data sets (715 MB)
Download HEC-RAS 5.0.5 Setup Package and Documentation (414 MB)

Alternate Download Site:
Download HEC-RAS 5.0.5 Setup Package Documentation, and Example Data sets (715 MB)
Download HEC-RAS 5.0.5 Setup Package and Documentation (414 MB)

Supported Operating Systems:
Windows 7, 8, 8.1, and 10 64-bit only
Note: If you are using Windows 7, 8, or 8.1; you must ensure that your operating system is up-to-date with all known Microsoft updates.



HEC-RAS 5.0.5 Documentation:    

Release Notes



HEC-RAS 5.0.5 Example Data:    

This file contains all of the HEC-RAS example data sets.

Download HEC-RAS 5.0.5 Example Data (299 MB)



HEC-RAS Tiles Server (64-bit):    

Download HEC-RAS Tiles Server (14.2 MB)

HEC-RAS Tiles Server Instructions



Archived Versions:    

Download HEC-RAS 5.0.4 Setup Package Documentation, and Example Data sets (715 MB)
Download HEC-RAS 5.0.4 Setup Package and Documentation (414 MB)
Download HEC-RAS 5.0.3 Setup Package Documentation, and Example Data sets (525 MB)
Download HEC-RAS 5.0.3 Setup Package and Documentation (202 MB)
Download HEC-RAS 5.0.1 Setup Package Documentation, and Example Data sets (525 MB)
Download HEC-RAS 5.0.1 Setup Package and Documentation (202 MB)
Download HEC-RAS 5.0 Setup Package Documentation, and Example Data sets (525 MB)
Download HEC-RAS 5.0 Setup Package and Documentation (202 MB)
Download HEC-RAS 4.1 (49.7 MB)
Download HEC-RAS 4.0 (45.4 MB)
Download HEC-RAS 4.0 Beta (35.6 MB)
Download HEC-RAS 3.1.3 (39.7 MB)
Download HEC-RAS 3.1.2 (44.6 MB)
Download HEC-RAS 3.1.1 (19 MB)
Download HEC-RAS 3.0 (24.5 MB)
Download HEC-RAS 2.2 (8 MB)