All 1 lift-served alpine areas in Illinois, each measured from its own lifts. The biggest is Chestnut Mountain Resort at 414 feet of vertical.
| Resort | Base ft | Summit ft | Vertical ft | Lifts | Lift km | Footprint ac | NDJFM mm |
|---|---|---|---|---|---|---|---|
| Chestnut Mountain Resort | 600 | 1,014 | 414 | 6 | 2.3 | 40 | 231 |
Base and summit are the lowest and highest lift terminal, read off AWS terrain tiles. Footprint acreage is the ground inside the hull of the lift lines — a lower bound on marketed acreage. NDJFM mm is the PRISM 1991–2020 November–March precipitation normal, averaged over the mountain's bands.