If I may, I would like to nominate my home town club--Keene CC --here in the Granite State-- Founded in 1899 with the total redo by Wayne Stiles in 1923( check out their website for a good walking tour) , it measures 6187 yds. from the tips, most play is from less than 6000, it will give you all you can handle.Francis Ouimet stated that it was the toughest " short" course he had ever seen. Small greens (fast) , elevation changes, tight fairways and one must be accurate. The 18th (288 yd. 4 par) , tight and downhill ,flanked by trees left and ob right and behind green is considered by many to be the most exciting finishing hole in New England. I know that's a bold statement but you would really have to see it to understand.
We conduct the Keene City Championship every July and the other course used is Bretwood and that plays at 7000 and has hosted numerous State Opens and USGA Quakifiers. The scoring average every year for the past 30 years has Keene CC playing a shot , shot and a half tougher than Bretwood. We use both courses every year. You must bring your A game to play Keene CC well.