With 7+ miles of trails on 470 acres Spaulding Woods in Northfield New Hampshore is a great place to go for a training ride.

Many of the trails are fine for beginners. Most are quite manageable. While some a quite challenging.

The best description of the area comes from the Trailforks Page.

Awesome lesser-known network of singletrack and doubletrack with mild elevation and some features including berms.

A great place to rip a cross-country or all mountain bike around if you are in the area.

Built and maintained by NEMBA and the Spaulding Youth Center.

Parking found at the boat launch, trailhead is at edge of woods at the field.

Check out this article.  https://www.spauldingservices.org/spaulding-woods-opens-seven-miles-new-...

You'll enjoy Spaulding Woods. 

One caution, the trails are best when dry.