Jeremiah OsGo: Playgrounds, trails, sports fields. Full size train to play on. Rock play sculptures. Rose and native plant gardens. Horseshoe pits. BBQ grills. Shelters for event rental. Avery House Nature Center.
Corvallis Maven: Here's another great place to walk the dog. (She needs a lot of walks. Terrier. Need I say more?) Bonus: start up by Jackson & walk all the way down to the dog park. Plus, it's a pretty, pretty walk.
Corvallis Maven: I <3 this little bookstore. It's a lovely little bookstore to visit, the staff is nice, and there's a good selection for such a bitty store.