Heat oven to 325°F. Grease a 9-inch springform pan. Mix cookie crumbs, butter, and salt; press firmly into bottom. Bake 8–10 minutes and cool slightly.
Beat cream cheese and brown sugar until smooth. Mix in pumpkin, sour cream, vanilla, and spices. Add eggs one at a time on low speed, just until incorporated.
Pour over crust. Bake 55–70 minutes until edges are set and center has a slight wobble.
Turn oven off, crack the door, and cool cheesecake gradually for 45–60 minutes. Refrigerate at least 6 hours, preferably overnight.
Whip cream with maple syrup until soft peaks form; add just before serving.