Editing Interstate 87 (New York) (section)

====Clinton County====
Just across the county line, I-87 intersects NY&nbsp;9N again at exit&nbsp;34 in [[Keeseville, New York|Keeseville]], finally leaving the more rural, mountainous areas of the [[Adirondack Mountains]] and entering a more populated region. Exit&nbsp;34 is the southernmost junction to feature [[bilingual]] guide signs in [[English language|English]] and [[French language|French]] due to the road's proximity to [[Quebec]]. Beyond NY&nbsp;9N, the Northway curves to the north, running along the west side of Keeseville before entering another rural but fairly level stretch that follows I-87 out of Adirondack Park. Now outside the park, the highway encounters more frequent pockets of development as it follows [[New York State Route 22|NY&nbsp;22]] into the town of [[Plattsburgh (town), New York|Plattsburgh]]. Just inside the town line, the Northway crosses over the Salmon River and intersects NY&nbsp;22 at exit&nbsp;36, a junction serving nearby [[Plattsburgh International Airport]]. While NY&nbsp;22 heads northeast into the city of [[Plattsburgh, New York|Plattsburgh]], I-87 runs north through its western suburbs, passing over the [[Saranac River]] and intersecting [[New York State Route 3|NY&nbsp;3]] at exit 37. The Northway and NY&nbsp;22 meet again north of downtown at exit&nbsp;38.<ref name="google" />

[[File:Northway Exit 34 (NY 915F).jpg|thumb|right|Bilingual sign for exit&nbsp;34 (NY&nbsp;9N) in [[Keeseville, New York|Keeseville]]]]
The section of I-87 between exits&nbsp;38 and&nbsp;39 crosses a marshy area surrounding Dead Creek, a stream feeding into nearby [[Plattsburgh Bay]]. Access to the bay shore is provided off to the northeast by exit&nbsp;39, a modified cloverleaf interchange for [[New York State Route 314|NY&nbsp;314]]. Continuing away from the junction, I-87 comes within {{convert|1|mi|km|spell=in}} of [[Lake Champlain]] as it follows US&nbsp;9 away from Plattsburgh and northward across open, rolling fields in the towns of [[Beekmantown, New York|Beekmantown]] and [[Chazy, New York|Chazy]]. Outside of the hamlet of Chazy, the Northway begins to run across a series of [[wetland]]s along the west side of US&nbsp;9. The marshy terrain follows I-87 into the town of Champlain, where I-87 encounters the northernmost community along its course, the village of [[Champlain (village), New York|Champlain]]. I-87 veers slightly westward to avoid the village, and in doing so it meets [[U.S. Route 11 in New York|US&nbsp;11]] at exit&nbsp;42, a diamond interchange just west of the village limits.<ref name="google" />
[[File:I-87 last mile to Canadian border.jpg|left|thumb|Approach to Canada–United States border in [[Champlain, New York|Champlain]]|alt=A divided highway going across a level landscape. On the right is a sign in English and French saying "Last U.S. Exit/Derniere Sortie EE. U." On the left the road goes away from the camera, up a slight rise to a more built-up area with a tall antenna.]]
I-87 takes a northerly track from US&nbsp;11, crossing the [[Chazy River]] and briefly entering the village limits, where it runs past a series of homes and businesses built up along nearby US&nbsp;9. As both roads head north out of the village, US&nbsp;9 connects to the Northway one last time (also the northern terminus of US&nbsp;9) at exit&nbsp;43, the last interchange on I-87 before the Canada–United States border. Past the exit, the highway doubles in width, becoming eight lanes wide as it begins to run past the customs facilities on the American side of the border. The Northway and I-87 end shortly thereafter at the Canada–United States border, where the highway continues past the [[Champlain–St. Bernard de Lacolle Border Crossing]] into Quebec as [[Quebec Autoroute 15|A-15]] toward Montreal.<ref name="google" />