Common spider, gray with mottled abdomen and very long legs. The underside of the long abdomen is very light colored.
Backyard porch wall at night.
Although another common name is Daddy Longlegs, this is not a Harvestman. "Phalangium, the genus of harvestmen/daddy-longlegs + -oides (οιδης)- "like, resembling" (only seen as an ending)." - BugGuide