Straight answer first: in the northern Poconos and Wayne County, leaves typically begin turning the last week of September, hit peak the first two weeks of October, and hold on lower ground through roughly October 20. Southern Pocono valleys run about a week behind.
That's the short version. The longer version is worth knowing, because "the Poconos" covers 2,400 square miles and the color doesn't arrive everywhere at once.
Week by week, roughly.
Last week of September. First real color at elevation. The high ground around Elk Mountain and the ridgetops of northern Wayne County go first. Red maples lead. Valleys are still mostly green.
First week of October. The show starts properly. Sugar maples turn, hillsides go orange and gold, and the higher half of the region sits between 50 and 80 percent. This is usually the best week for the northern corner, including Starrucca and the lake country.
Second week of October. Peak nearly everywhere north of Honesdale, and the safest single week to book if you're picking blind. Oaks add the deep russet layer that makes the hills look lit from inside.
Third week of October. Higher elevations start dropping leaves, but the valleys and lake shores are often at their best. The Upper Delaware river corridor tends to hold color latest because the water moderates the temperature.
After October 20. Mostly oaks and beeches left, which keep their bronze well into November. Different mood, still beautiful, and the cabins are easier to book.
What moves the dates.
Two things, mostly. A warm wet September pushes everything later by up to a week. An early cold snap with clear nights speeds it up and sharpens the reds, because cool nights trap sugars in the leaves and sugars make the color. Drought years mute everything and drop leaves early. If you're watching the forecast in late September, cold clear nights are the signal to book the following two weekends.
Why elevation matters more than latitude here.
The rule of thumb foresters use is that every 300 feet of elevation equals about a week of season. Wayne County's hills run from around 900 feet in the river valleys to just over 2,000 on the high ground, so the same county can show three different stages of fall on the same Saturday. It's why a foliage drive here works so well: you drive through the timeline instead of waiting for it.
Seeing it from the water.
The underrated version of leaf season is from a boat. Shehawken Lake is a 54-acre spring-fed lake ringed with maple and birch, and because only electric motors are allowed, October mornings out there are dead silent except for loons. The still water doubles the color. Guests fish through the whole season, and fall is when the lake's bass and pickerel feed hardest before winter.
If the question behind your search is really "when should I book a fall weekend," the answer is: the first two weekends of October for peak, the last weekend of September if you want color plus warmer afternoons, and late October if you want the place to yourself.