Difficulty? 1, 2, or a 3. Could kids do this?

Difficulty is 2. Kids can do it; it's just a paved street, but a long one. Take your time and take short breaks. Watch this: https://youtu.be/te_CRQll-pw

Very steep paved road. Kids can probably hike the trail, but it all depends on the kid's ability.

Bring water! If you're doing the loop!