Route 37 begins not too far north of where Sudowoodo was found on Route 36. On its western half, there is a bi-directional path which Trainers can take both to and from Ecruteak City. This road makes its way north from Route 36 and loops around a small tree, which a pair of Twins are training together. From there, a large gap in a wide ledge, which allows the path to continue north past a large patch of tall grass, several more Trainers, and a signpost, until they reach Ecruteak City.
However, the eastern half of the route holds greater treasures for Trainers. Unlike, the western side, this path can only be traversed in one direction; north-to-south. The path begins by jumping a small ledge, which presents three Apricorn trees in a small clearing between the ledge and a patch of tall grass. This is also the location of one of the Week Siblings, Sunny, who appears on Sundays, giving out a Magnet to Trainers who meet him for the first time, and a Smile Ribbon after the first meeting with him. The stretch continues south past the patch of tall grass, until it connects with the western half at the southern entrance.