A 45-foot cascade where Flume Brook enters the head of the narrow granite Flume Gorge in Franconia Notch State Park. It is reached as the climax of the ticketed Flume Gorge boardwalk loop, not as a free roadside falls.
At 45 ft, it stands above roughly 35% of the 775 documented falls in this guide.
The falls are fed by Flume Brook. You'll find it in Grafton, New Hampshire. It is protected within Franconia Notch State Park.
This is a short hike waterfall: reached by a short trail, generally under about a mile each way. A short walk gets you to the viewpoint, so it works for most casual visitors and families. The walk to the main viewpoint runs about 2 miles round trip. Base a visit out of Lincoln, the closest town.
When to go: Late spring to fall (paid loop typically open May-Oct). Like most waterfalls, Avalanche Falls runs highest after snowmelt or heavy rain and can thin out in late summer, so it's worth checking recent streamflow and the land manager's conditions page before a long drive.
