Glad you had a fun race- Keezlenutten (west side of Mass) is also one of my favorite races. The
Hoo-Ha takes place there every year, be sure to try it next season. With that race loop you get a full 20 mile course including Kaylor's Knob, a 2 mile rock garden gradually uphill on the ridge. It sounds horrible, but it's crazy fun when you get there.
I was at the
Middle Mountain Momma in Douthat last weekend. That's another good long mountain race to do. It's crazy hard, 2 mountains with false summits and a few more hills thrown in. 5-6000 ft of elevation gain in 21 miles.
Good luck with the rest of your race season!