Gravity Falls

For their summer vacation, 12-year-old Dipper Pines and his twin sister Mabel are dropped off from their home in Piedmont, California to the fictitious town of Gravity Falls, Roadkill County, Oregon to spend the summer with their Great Uncle Stan Pines (often shortened to Grunkle Stan), who runs a tourist trap called the 'Mystery Shack'. Things are not what they seem in this small town, and with the help of a mysterious journal that Dipper finds in the forest, they begin unraveling the local mysteries. With appearances from Wendy Corduroy, Mystery Shack cashier; Soos Ramirez, friend of Dipper and Mabel and handyman to Grunkle Stan; plus an assortment of other characters, Dipper and Mabel always have an intriguing day to look forward to.

Question: is there a town called gravity falls in oregon
Answer: no