Kick off summer with a riverside dash through Billings’ best paths
Overview
The Rims to River 8K launches the Free 3 series with a course that blends the wide-open beauty of Montana’s riverfront with the energy of a vibrant running community. This mid-spring race is fast, flat, and welcoming, whether you are chasing a new PR or simply enjoying the flow of the Yellowstone River beside you.
This year's event took place on
Wednesday, May 7, 2025
Registration
Opens
Aug 30, 2025, 3:01 AM
Registration Fee
![](data:image/svg+xml,<svg display="block" role="presentation" viewBox="0 0 20 17" xmlns="http://www.w3.org/2000/svg"><g d="M 9.952 2.85 C 9.606 2.377 9.136 1.903 8.542 1.43 C 7.362 0.477 6.162 0 4.942 0 C 3.816 0 2.729 0.41 1.682 1.23 C -1.111 3.53 -0.571 6.913 3.302 11.38 C 5.242 13.607 7.459 15.607 9.952 17.38 C 12.452 15.607 14.672 13.607 16.612 11.38 C 20.486 6.913 21.022 3.53 18.222 1.23 C 17.176 0.41 16.092 0 14.972 0 C 13.752 0 12.549 0.477 11.362 1.43 C 10.996 1.723 10.649 2.047 10.322 2.4 L 9.952 2.85 M 2.442 2.17 C 3.269 1.523 4.102 1.2 4.942 1.2 C 5.882 1.2 6.836 1.59 7.802 2.37 C 8.289 2.763 8.682 3.16 8.982 3.56 L 9.952 4.87 L 10.922 3.56 L 12.102 2.37 C 13.069 1.59 14.026 1.2 14.972 1.2 C 15.799 1.2 16.632 1.523 17.472 2.17 C 18.366 2.903 18.792 3.783 18.752 4.81 C 18.692 6.47 17.576 8.51 15.402 10.93 C 13.836 12.67 12.019 14.323 9.952 15.89 C 7.886 14.323 6.069 12.67 4.502 10.93 C 2.329 8.51 1.212 6.47 1.152 4.81 C 1.126 3.777 1.556 2.897 2.442 2.17" fill="transparent" height="17.379999952316282px" id="AxX6s3ET9" width="19.984374960920544px"><path d="M 9.952 2.85 C 9.606 2.377 9.136 1.903 8.542 1.43 C 7.362 0.477 6.162 0 4.942 0 C 3.816 0 2.729 0.41 1.682 1.23 C -1.111 3.53 -0.571 6.913 3.302 11.38 C 5.242 13.607 7.459 15.607 9.952 17.38 C 12.452 15.607 14.672 13.607 16.612 11.38 C 20.486 6.913 21.022 3.53 18.222 1.23 C 17.176 0.41 16.092 0 14.972 0 C 13.752 0 12.549 0.477 11.362 1.43 C 10.996 1.723 10.649 2.047 10.322 2.4 L 9.952 2.85 M 2.442 2.17 C 3.269 1.523 4.102 1.2 4.942 1.2 C 5.882 1.2 6.836 1.59 7.802 2.37 C 8.289 2.763 8.682 3.16 8.982 3.56 L 9.952 4.87 L 10.922 3.56 L 12.102 2.37 C 13.069 1.59 14.026 1.2 14.972 1.2 C 15.799 1.2 16.632 1.523 17.472 2.17 C 18.366 2.903 18.792 3.783 18.752 4.81 C 18.692 6.47 17.576 8.51 15.402 10.93 C 13.836 12.67 12.019 14.323 9.952 15.89 C 7.886 14.323 6.069 12.67 4.502 10.93 C 2.329 8.51 1.212 6.47 1.152 4.81 C 1.126 3.777 1.556 2.897 2.442 2.17" fill="rgb(255, 0, 0)" height="17.379999952316282px" id="ql_EbdlRv" transform="translate(0 0)" width="19.984374960920544px"/></g></svg>)
