Warren and Essex counties thumb|Northbound Northway in Warren County between exits 23 and 24|alt=A view of a divided highway from its righthand roadway, with two lanes separated by a dashed white line. There is almost no other traffic; the surrounding area is wooded with some autumn color visible. Ahead the roadways curves by a hill and disappears. Between the bridge and exit 18, I-87 passes two rest areas, one for each direction. The road's northward course quickly brings it to the outskirts of Glens Falls, and as such the highway heads across another swath of residential neighborhoods. Exits 18 and 19 are the main exits for the city, with the latter connecting to NY 254 near Aviation Mall, located on NY 254 just west of the route's junction with US 9. A northwestern turn in the freeway takes I-87 past the Great Escape amusement park and lodge, both of which are accessed from exit 20 and NY 149. Past exit 20, I-87 runs across increasingly remote areas of Queensbury as the road enters Adirondack Park and heads toward Lake George. The freeway closely follows US 9 northwest to the village of Lake George, where I-87 meets NY 9N via exits 21 and 22. Route 9N veers to the northeast along the shore of Lake George as "Lake Shore Drive", toward the town of Bolton Landing, a popular village on the shore of Lake George with shops and restaurants. Exit 22 is the last exit before the Northway begins traversing approximately of mostly rural areas where the exits become farther apart. Here, the Northway narrows from six to four lanes, preparing for the more rural areas and rugged terrain that follow. thumb|left|View to High Peaks region from the northbound side of the Northway in Schroon Lake|alt=A two-lane roadway with a white dashed line in the center, white solid line at the right edge, dashed yellow line at the left and brown metal guardrail alongside the left edge, with woods on either side, drops down a slope in the foreground. In the distance, blue with haze, is an irregular, ragged ridgeline North of Lake George, the Northway runs alongside US 9 to Warrensburg, a small town on the Schroon River served by exit 23. The view straight ahead on the northbound side from this interchange acts as an unofficial gateway to the Adirondacks, with tall mountains acting as a backdrop to a straight stretch of highway. While US 9 heads northwest into the Warrensburg to connect to NY 28, I-87 turns northward to follow the east bank of the Schroon River for through a deep, remote valley. The Northway reaches exit 24 while in this valley, which once again serves the town of Bolton Landing. Exit 25 serves NY 8 at a diamond interchange. The stretch away from US 9 ends at exit 26, where I-87 reconnects to US 9 in Pottersville. At this point, I-87 makes a slight turn to the northeast to follow US 9 as the latter road runs along the western shoreline of Schroon Lake. Both roads pass a handful of lakefront properties on their way into Essex County and the town of Schroon Lake, where the lake comes to an end and NY 74 begins its eastward trek to Ticonderoga at exit 28. The Schroon River resumes north of the exit, and I-87 and US 9 follow the river and its rural valley to the northeast for to the town of North Hudson.
Warren and Essex counties thumb|Northbound Northway in Warren County between exits 23 and 24|alt=A view of a divided highway from its righthand roadway, with two lanes separated by a dashed white line. There is almost no other traffic; the surrounding area is wooded with some autumn color visible. Ahead the roadways curves by a hill and disappears. Between the bridge and exit 18, I-87 passes two rest areas, one for each direction. The road's northward course quickly brings it to the outskirts of Glens Falls, and as such the highway heads across another swath of residential neighborhoods. Exits 18 and 19 are the main exits for the city with the latter connecting to NY 254 near Aviation Mall, located on NY 254 just west of the route's junction with US 9. A northwestern turn in the freeway takes I-87 past the Great Escape amusement park and lodge, both of which are accessed from exit 20 and NY 149. Past exit 20, I-87 runs across increasingly remote areas of Queensbury as the road enters Adirondack Park and heads toward Lake George. The freeway closely follows US 9 northwest to the village of Lake George, where I-87 meets NY 9N via exits 21 and 22. Route 9N veers to the northeast along the shore of Lake George as "Lake Shore Drive", toward the town of Bolton Landing, a popular village on the shore of Lake George with shops and restaurants. Exit 22 is the last exit before the Northway begins traversing approximately of mostly rural areas where the exits become farther apart. Here, the Northway narrows from six to four lanes, preparing for the more rural areas and rugged terrain that follow. thumb|left|View to High Peaks region from the northbound side of the Northway in Schroon Lake|alt=A two-lane roadway with a white dashed line in the center, white solid line at the right edge, dashed yellow line at the left and brown metal guardrail alongside the left edge, with woods on either side, drops down a slope in the foreground. In the distance, blue with haze, is an irregular, ragged ridgeline North of Lake George, the Northway runs alongside US 9 to Warrensburg, a small town on the Schroon River served by exit 23. The view straight ahead on the northbound side from this interchange acts as an unofficial gateway to the Adirondacks, with tall mountains acting as a backdrop to a straight stretch of highway. While US 9 heads northwest into the Warrensburg to connect to NY 28, I-87 turns northward to follow the east bank of the Schroon River for through a deep, remote valley. The Northway reaches exit 24 while in this valley, which once again serves the town of Bolton Landing. Exit 25 serves NY 8 at a diamond interchange. The stretch away from US 9 ends at exit 26, where I-87 reconnects to US 9 in Pott,ersville. At this point, I-87 makes a slight turn to the northeast to follow US 9 as the latter road runs along the western shoreline of Schroon Lake. Both roads pass a handful of lakefront properties on their way into Essex County and the town of Schroon Lake, where the lake comes to an end and NY 74 begins its eastward trek to Ticonderoga at exit 28. The Schroon River resumes north of the exit, and I-87 and US 9 follow the river and its rural valley to the northeast for to the town of North Hudson.