The arrow on the map points to just north of the campsite and snow park that has been mentioned here. The map also shows how Annie Creek is bordered by the road. Several other streams flow into Annie Creek in the upper reaches.
Not shown on this map, Annie Creek eventually flows into Wood River, which flows into Klamath Lake at the south end of Wood River Valley, about 20 miles south of the park.
I am not good at maps so I will look at the pictures below instead.
Suffice to say that people coming to the park from the south pass by here.
These are the places I like to visit.
That describes me as well.