The route begins near the Route 2 entrance and splits into two paths. The northern path curves along the cliff overlooking the sea, with a patch of tall grass on a smaller cliff protruding outward along the way. The southern path is divided into yet two more, smaller paths by a mass of rock, around which Flying-type Pokémon circle in a clockwise direction. There is a small indent on the northern side of the rock mass in which the player can find a hidden Stardust. Both paths converge in front of the entrance to Melemele Meadow. South of the entrance is a wooden bridge as well as a side path that leads to a cliff overlooking Kala'e Bay. At the northern end of this cliff are a few breakable rocks, behind which the player can find TM83 (Infestation). The player can also find Ace Trainer Makana, who will only battle the player after defeating every other trainer in the area, right before crossing the bridge to the southern portion of the route.
South of the bridge is a straight path to Route 1. Along the way the player can find a Sightseer who asks the player to register RockruffSM or SableyeUSUM in their Pokédex. Just before the exit to Route 1 is another side path that leads to another, lower cliff overlooking Kala'e Bay, with a Berry tree at its northern end.
The Berry pile can have two sizes: a small pile that yields three random Berries or a large pile that yields four to five Berries. The first Berry in a large pile is fixed. In large piles, the player will always find a high level Crabrawler hiding among the Berries that the player must defeat in order to collect them; small piles only occasionally have low level Crabrawler hiding among the Berries. The Berry pile regenerates daily.
Route 3 appeared in Twirling with a Bang!, where the Ultra Guardians were dispatched there after being informed of the presence of an Ultra Beast in the area. Initially, they assumed that it was the Blacephalon they had met the night before, but upon arriving, they discovered that the Ultra Beast was actually a Xurkitree, which was absorbing electricity from a power line. The Ultra Guardians attempted to capture Xurkitree, but were interrupted when Blacephalon suddenly appeared. The two Ultra Beasts then started a performance showdown, with both of them trying to outdo each other in their display of moves.
The Beast Balls that the Ultra Guardians attempted to throw at the combatting Ultra Beasts were deflected by the air pressure caused by their moves, so they needed to figure out another way of dealing with them before their performance battle would escalate too much. Eventually, Ash came up with the idea of the group using their Pokémon to create an even more spectacular performance to distract the Ultra Beasts, which would give him an opening to use his Lycanroc's Z-Move on them. The plan was successfully executed, and while Blacephalon and Xurkitree were still recovering from Lycanroc's Splintered Stormshards, Lana and Lillie seized the chance and successfully captured the two Ultra Beasts, allowing them to be safely returned to their respective homeworlds the next day.