River

From Nookipedia, the Animal Crossing wiki

A river is one of the six types of water in Animal Crossing, the others being the sea, the lake, the pond, and the waterfall. They stretch from one side of the town and empty into the sea at the other. A river begins as a waterfall at an edge of town and passes through the town. In all towns, a river flows through a lake. Some towns have a river that splits in two, creating an Islet. There are usually two or three bridges crossing a river. Fish can be caught in the river.

River
River.jpg
Type of geography Water
Rarity Always
ACMap.jpg

In Animal Crossing: New Leaf, rivers can be shaped differently. They always begin at the east or west of town, instead of the north.

The river mouth is the area where the river meets the sea. Some fish can be caught only in this particular spot. In some towns, there may be two or more of these, increasing the chances of catching these fish.

Geography
Land
AcresBeachCanyonCliffGrassInclineIsletTreeRock
Water
BayLakePondRiverSeaWaterfall
Locations
Town (Main StreetCampground)CityAnimal IslandTortimer IslandHarv's IslandMystery Islands
Phenomena
AuroraEnvironmentGlowing SpotGrass DeteriorationMoney RockWeather (Tan)
Category
Locations
World
Town (Main Street)CityAnimal IslandTortimer IslandHarv's IslandMystery Islands
Structures
Player's houseVillager housesBridgeBulletin BoardEvent Plaza (Town Tree)FountainInclineLighthouseSignpostWindmillWishing Well
Transit Facilities
AirportBus StopPierTown GateTrain Station
Civic Facilities
Campground (RV)CampsiteDumpMuseum (ObservatoryThe Roost)Police StationPost OfficeResetti Surveillance CenterResident ServicesTown Hall
General Store
Tom Nook's shop (Nook's CrannyNook 'n' GoNookwayNookington's)T&T stores (Nookling JunctionT&T MartSuper T&TT.I.Y.T&T Emporium)
Merchants
Able SistersAuction HouseCrazy Redd'sFortune ShopGarden ShopGracieGraceJolly Redd's Treasure TrawlerKicksMuseum ShopNook's HomesRe-TailShampoodle
Entertainment
Club LOLDream SuiteHappy Home ShowcaseHappy Room AcademyThe MarqueePhoto BoothThe Roost Café
Spin-off locations
Happy Home Designer
FacilitiesCafeConcert HallDepartment StoreHospitalHotelOfficeRestaurantSchoolShop
Pocket Camp
CampsiteCabinMarket Place (Nookling GlobalAble Sisters To GoKicks)Breezy HollowLost Lure CreekOK MotorsSaltwater ShoresShovelstrike QuarrySunburst Island
Implied locationsBoondoxCategory