Another nice hike I know of would be up Chick Hill in Clifton.
The Chick Hill road is on the left off from Rte 9 (if you are heading away from bangor/brewer.)
The access to it is actually called the Chick Hill Road and it is about a 5 minute drive past where Rte 9 and Rte 46 intersect at the Tradewinds fuel station and convenience store.
Follow the Chick Hill Road until you reach a parking lot-looking area (maybe 1 mile off rte 9?) Park there, the dirt road that goes up the hill is the trail. There is one intersection on the hiking trail where the road offers a right turn or straight option. Take the right turn and keep on trucking... you'll end up at the top of Chick Hill. I'd guess the whole trail is about a mile to a mile and a half. Give or take.
I'd rank this trail probably as a 3. There are some steeper sections and some places with loose granite rocks, but it is passable by 4wd vehicle and a conscientious driver.
I know when we go up in the Jeeps, we pass a lot of folks hiking it or walking with dogs. Most folks are very friendly.