I set up my own 5-mile-radius patch sometime last year. Compared to some of the coastal patches, mine isn't terribly exciting, but it still encompasses a nice selection of habitats. Centered on Witham Hill in Corvallis, it does include pretty much all of Corvallis (including Bald Hill, Fitton Green, Willamette Park, and Avery Park), most of McDonald Forest, Kiger Island, Herbert Natural Area (yay!), the Philomath Sewage Ponds (big bonus!), and most of Philomath town.
My 5MR life list currently stands at 255 species; for 2019, I am at 74 species. I agree that this is a fun birding exercise that concentrates my efforts closer to home and gives me an excuse to beat some of the local patches.
Have fun out there!
-- __________________________ Hendrik G. Herlyn Corvallis, OR
*"Nature is not a place to visit. It is home." -- Gary Snyder*