This plant appears to be growing by wrapping around a tree and blooming flowers at its branches. There are also leave growing out that were fairly smooth but had tiny hair like "leave" protruding all over the plant itself except for the leaves. Any information on this plant is welcome in the comment section.
One of a few in bloom, so far.
"Marah macrocarpus", according to what I can find in the "Audubon Guide to Wildflowers" and Peterson Field Guides' "Pacific States Wildflowers" with additional note from a local botanist that they've been getting some hybridization between "Marah" species on this area.