This year’s fall foliage in the Adirondacks arrived earlier than usual, and while the hillsides around Upper Saranac Lake remain beautiful, the colors are more subdued than in many previous years. The unusually dry summer of 2025 placed stress on regional forests, altering the natural processes that produce the vibrant reds and purples typically associated with peak autumn.
The science behind this change is well understood. In fall, shorter days and cooler nights trigger trees to break down chlorophyll, revealing the yellow and orange pigments already present in leaves. Under optimal conditions—sunny days and cool, frost-free nights—many species also generate anthocyanins, the pigments responsible for vivid red and purple hues. Drought disrupts this process. Trees under water stress shift into conservation mode, often dropping leaves prematurely or producing muted colors rather than investing energy into pigment production.
These stresses on the forest canopy have broader ecological consequences. Prolonged drought weakens trees, reducing their ability to fend off pests and diseases, and increasing their vulnerability to wildfire. Over time, these conditions may influence species composition, favoring drought-tolerant trees while placing iconic northern hardwoods under pressure. Climate change is amplifying these challenges: the Adirondacks are experiencing warmer temperatures and shifts in precipitation patterns, with more rain and less snow, altering snowpack, hydrology, and the timing of seasonal events, further stressing forest and watershed resilience.
The impact extends beyond the forest into the watershed. Low precipitation reduces streamflow, lowers lake levels, and concentrates nutrients and pollutants. The health of aquatic ecosystems and the clarity of Adirondack lakes are directly tied to the condition of surrounding forests.
At Upper Saranac Lake, the Foundation’s long-term water quality monitoring program helps track these dynamics and ensures that changes are understood in real time. Overall, lake health remains strong, and the forests and waters of the Adirondacks continue to support vibrant wildlife and recreation. While the drought of 2025 has visibly muted the fall foliage in some areas, the season has also brought sunny skies, warm days, and spectacular conditions for boating, hiking and enjoying the outdoors. Through careful monitoring and stewardship, we can continue to protect this remarkable landscape, ensuring that the water quality of the Upper Saranac watershed endures.
