Grist Mill Bridge – Smugglers' Notch Summit loop from Jeffersonville

If you're looking for a truly epic gravel biking adventure that tests your limits and rewards you with incredible scenery, the Grist Mill Bridge – Smugglers' Notch Summit loop from Jeffersonville is absolutely worth your time. This difficult 42.0-mile (67.6 km) route packs in a hefty 3619 feet (1103 metres) of climbing, taking around 4 hours and 11 minutes to complete. It's a serious undertaking for experienced riders seeking a challenging day out in the Green Mountains.

What to expect on Grist Mill Bridge – Smugglers' Notch Summit loop from Jeffersonville

This route throws a bit of everything at you. You'll start on less steep grades, warming up as you pass the historic Grist Mill Bridge over the picturesque Brewster River. But don't let that fool you; the real challenge begins as you head towards Smugglers' Notch. The terrain shifts to a mix of unmaintained county roads and mixed-surface paths, eventually leading to the infamous 'blacktop corkscrew' of Route 108 with its 16% grades. Expect a sustained, steep climb through dense hardwood forests, with parts reaching an average of 4.1% over 7.7 miles, and the steepest quarter-mile hitting 8.8%. Near the summit, you'll navigate a very interesting narrow gap with towering cliff faces and striking views of Mount Mansfield and Spruce Peak. This loop demands good fitness and advanced riding skills, as some sections may even require you to push your bike.

Planning your visit

The road through Smugglers' Notch (Route 108) is famously challenging and closes in winter due to its steep grades and tight curves, so plan your ride for warmer months when it's open. While specific parking details for this exact loop aren't provided, Jeffersonville offers a good starting point. Be prepared for significant elevation changes and varied terrain; carry plenty of water, especially on warmer days. This is a full-day adventure, so an early start is recommended to make the most of the daylight.

Trail details

• Distance: 42.0 miles (67.6 km)
• Elevation gain: 3619 feet (1103 metres)
• Difficulty: difficult
• Estimated time: 4 hours and 11 minutes