Monmouth hill
I grew up in middletown. I do recall some hills heading back into Holmdel, though traffic is probably pretty bad nowadays. And I agree a few hills in Highlands, you can do repeats. I live in Baltimore now where a 20 mile ride from my house has a minimum of 1000 feet of climbing and a forty mile ride can be 2000+. Easy to do a 50 mile 4000+ ride around here. But then we also have the nice flats of the eastern shore. You gusy should come down for the Seagull Century in Oct.