Wow!
Where in Northern California is this?
I have some grapes kinda growing wild. I think I better put a stop to them before they get out of control.

Yeah, and this is only a taste of all that's out here. Lots and lots of old, thick-trunked, tree-toppling grape vines.

This is right around the Bear River Campgrounds, just below Colfax, CA.

Josh

Here is a link that might be useful: Colfax, California

Wild grape, creating a clearing...

In my younger years when I was a stay at home mom. I would walk the back roads and pick the wild grapes to make jelly. The black berries and dew berries were also plentifull there also.
This was on the Eastern Shore of Maryland.
And yes they will take over and kill the trees's.

Killing trees then provides an open area for a different type of flora. Then the cycle repeats.