Rainbow Trail is a 7.3 mile moderately trafficked point-to-point trail located near Jackson, NH that features beautiful wild flowers and is rated as moderate. The trail is primarily used for hiking, walking, nature trips, and birding and is accessible from March until October.
We did the last 2.2 of this after starting on Bog Brook trail on our way to camp at the Carter Notch hut. It was definitely and intense climb, especially on a hot day like we went. It's a rocky, fairly steep continous climb up until you finally reach the AT junction. Nice view once you summit, but be prepared to have trek up for days. Also pack sufficient water as there is nowhere to refill until you reach the ponds or turn around.
Be ready to burn some calories on this trail. Very steep accent up to Carter Dome.