Cinemachine FreeLook Camera that doesn't go under floor/terrain

I'm using a Cinemachine Free Look camera for a 3D side-scrolling game. I have the camera's follow and lookAt set to my character. It's working great, but I'm trying to figure out the best way to avoid the camera going under the floor/terrain. My floor/terrain is bumpy and sometimes it goes underneath it as the foreground terrain where the camera is - is higher in Y position than the character.

My instinct would be to shoot a ray down from the camera position and ensure the camera's y.position never goes below the floor based on a RaycastHit info...With the freelook camera I feel that I should adjust the Y-Axis under Axis Control to ensure the camera doesn't go under the floor, but adjusting the Y-Axis proves difficult to get it to feel smooth as the axis value isn't linear to hit distance of the ray.

I bet Cinemachine has a better way built in, but I can't seem to find it via google search or videos. Any advice on this would be appreciated.

 

Wow! This works perectly. Never seen these extensions before... For others who google this. In the Inspector > FreeLook component > Extensions > Add Extension > CinemachineCollider

Thanks greg!