Joe Dabes and others have reported more frequent sightings of porcupines along the Finger Lakes Trail. Generally they’re not much of a threat to humans (they’re more likely to climb a tree and curl into a ball when they see you) but, it’s highly recommended that you keep dogs leashed on the trails. When a dog encounters a porcupine, it’s not a pleasant experience for the dog – often requiring a trip to the vet.
Sherrie suggested sprinkling Critter Ridder granules under your car (organic and biodegrades) if you’re leaving it near a trail overnight. Porcupines have been known to chew up all of the rubber under the hood of a car (transmission lines, radiator hose, brake boots, etc.).