HEC-RAS Downloads

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HEC-RAS

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.

HEC-RAS 6.7 Beta 3 Windows:

The setup package includes HEC-RAS 6.7 Beta 3.

Primary Download Site:
Download HEC-RAS 6.7 Beta 3 Setup Package (193 MB) [Release Notes]

Alternate Download Site:
Download HEC-RAS 6.7 Beta 3 Setup Package (193 MB) [Release Notes]

Supported Operating Systems:
Windows 10/11 64-bit

HEC-RAS 6.6 Windows:

The setup package includes HEC-RAS 6.6.

Primary Download Site:
Download HEC-RAS 6.6 Setup Package (209 MB) [Release Notes]

Alternate Download Site:
Download HEC-RAS 6.6 Setup Package (209 MB) [Release Notes]

Supported Operating Systems:
Windows 10/11 64-bit

HEC-RAS 6.6 Example Projects:

This file contains all of the HEC-RAS example projects.

Download HEC-RAS 6.6 Example Projects (422 MB)

HEC-RAS Archived Versions Windows:

Archived Versions:

Download HEC-RAS 6.7 Beta 2 Setup Package (193 MB) [Release Notes]
Download HEC-RAS 6.7 Beta Setup Package (203 MB) [Release Notes]
Download HEC-RAS 6.5 Setup Package (203 MB) [Release Notes]
Download HEC-RAS 6.4.1 (Primary) Setup Package (205 MB) [Release Notes]
Download HEC-RAS 6.3.1 (Primary) Setup Package (205 MB) [Release Notes]
Download HEC-RAS 6.3.1 (Alternate) Setup Package (205 MB) [Release Notes]
Download HEC-RAS 6.3 Setup Package (201 MB) [Release Notes]
Download HEC-RAS 6.2 Setup Package (201 MB) [Release Notes]
Download HEC-RAS 6.1 Setup Package and Documentation (336 MB) [Release Notes]
Download HEC-RAS 6.0 Setup Package, Documentation, and Example Data sets (729 MB) [Release Notes]
Download HEC-RAS 5.0.7 Setup Package Documentation, and Example Data sets (691 MB) [Release Notes]
Download HEC-RAS 5.0.7 Setup Package and Documentation (385 MB) [Release Notes]
Download HEC-RAS 5.0.6 Setup Package Documentation, and Example Data sets (659 MB)
Download HEC-RAS 5.0.6 Setup Package and Documentation (358 MB)
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)
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)

Download
Visit RAS 2025 Alpha page for download

Supported Operating Systems:
Windows 10/11 64-bit

HEC-RAS 6.6 Linux:

The Linux setup package (zip format) contains HEC-RAS 6.6. However, HEC is unable to provide any support or assistance with this version of HEC-RAS beyond the scope of what is included in the provided Release Notes.

Current Version:
Download HEC-RAS 6.6 for Linux (213 MB) [Release Notes]

Archived Versions:

Download HEC-RAS 6.5 for Linux (212 MB) [Release Notes]
Download HEC-RAS 6.1 for Linux (245 MB) [Release Notes]
Download HEC-RAS 5.0.7 for Linux (114 MB) [Release Notes]

HEC-RAS Tiles Server (64-bit):

Download HEC-RAS Tiles Server (14.2 MB)

HEC-RAS Tiles Server Instructions