Spenceville ground wasps at the second gate. From a reporter: Rode at Spenceville yesterday and my horse got stung by wasps on one of the gates. Didn't notice them till we got too close. I reported it to Park Watch Report and it should get to CA Fish and Game. Location: if you park at the cattle pen area, go across the street, through new little gate, turn left parallel road, then right to go to the creek. It's the second gate after the creek.
UPDATE JULY 18, 2019, 7:30PM
A reporter saw yellow jackets setting up house in the post with the sign next to the big rock a lot of the equestrians use for a mounting rock at Magnolia Ranch trailhead yesterday afternoon.
JULY 18, 2019, 10:10 AM
A reporter encountered some ground wasps yesterday on the new bridge out of the Magnolia Ranch trailhead.
All trail users, beware! You can upset these territorial wasps by just sauntering by their ground nests. Wasps can sting repeatedly and cause serious, even life threatening, allergic reactions on people and their pets. If you encounter them, quickly (run!) leave the area they are protecting. If you would like to help reduce their populations around trails, contact the land manager and ask if you can hang and GPS wasp traps near their nests. GPS helps you remove them in the late fall.