It is a bit odd to see so many lady bugs together...
I've seen lady bugs gather like this, always when it is cold and damp. This picture was taken in the morning, after a rain, in the parking lot at the Pinnacles. The rocks and plants were coated with them. When we came back to our car in the late afternoon, they were gone.
I've seen that too on several mountain tops. One was in Idaho, another in Nevada and yet another in California. I understand the reason why bears will sometime go for the summit of a peak is that they are after the ladybugs that
can be found there.
I am told it is an insect behavior that helps them find mates--flying to the highest point. Butterflies can be spectacular when they do it.
There was a huge swarm of ladybugs on top of Lookout Mt. (Wallowas, between Minam and Lostine drainages,) when our household trudged up in the mid eighties.