The Yellow & Red Blaze Loop Trail at the Black Stevens Conservation Area in South Hadley, Masschusetts is an easy 0.9 mile hike along a couple different trails in the park. The trail is located by the field next to the Plains School, so you can find parking here and hike in along the Yellow Blaze trail, which is also known as the Main Trail. These trails are perfectly maintained and there are many side trails to turn around and go just about anywhere you want. This trail follows along a small gorge before looping back towards the school.
Blazes to follow: This hike follows the Yellow Trail (Main Trail) initially before turning left onto the Plains School Trail (Red Blazes). Continue on the Red Blaze trail until you reach the Yellow Blaze trail again - take a left, heading west, at this intersection. Continue on until you see a right-hand turn for the Yellow Dot Trail (also known as the K & N Trail). Head Back on the Yellow Dot Trail (K & N Trail), which will turn back into the Main Trail to get back to parking.
More info: Check out the attached trail map picture for this trail, it should make following the trails a bit easier.