Is this poison ivy?

[ChrisMU]

The first picture looks like Ash, possibly green ash for the leaves that are yellow. The vine-looking green leaves on the left might be honeysuckle, but definitely not PI. The green leaves to the right are some member of the red oak family. Pics two and three look like PI. I’ve had success with Crossbow or Crossroad (a knockoff?) herbicide, which is mostly 2-4,D and Triclopyr.

 

[mk378]

The one in the first picture with yellow leaves is definitely not. Note that it has two smaller leaves on each stem below the main three leaves. Poison ivy does not have that, there are only the three leaves at the end of the stem.

 

[vavavroom]

Bah, poison this and poison that. Even in the water, they get you. Or me. Brief contact with a Pacific sea nettle jelly while dogpaddling caused this. You really don't want to get your face wrapped by their tentacles.