Middle Carter via Zeta Pass

The Middle Carter via Zeta Pass is 11.4 miles round trip, starting at Nineteen-Mile Brook Trailhead (Route 16). At AMC book time (half the distance in hours plus 30 minutes per 1,000 ft of climbing), that works out to roughly 6-10 hours. Most parties take longer than book time on rough or above-treeline terrain, in winter, or with a heavy pack.

The Middle Carter via Zeta Pass climbs about 3,701 ft over 11.4 miles, an average of roughly 324 ft of gain per mile. That figure is cumulative ascent across the whole out-and-back, not the difference between the trailhead and the high point.

HikerNerd rates the Middle Carter via Zeta Pass Very hard on a six-tier scale from Easy to Most demanding. The rating comes from the route itself: its 11.4 miles, 3,701 ft of gain, and the steepest quarter mile of trail, with routes known for scrambles or ledges rated a step harder. It is the same scale our NH 4,000-footer difficulty ranking uses. Above-treeline exposure, water crossings, and winter conditions can still make a well-rated route the hardest day of your year, so check current conditions before committing.

The Middle Carter via Zeta Pass summits 2 named peaks: Middle Carter Mountain, South Carter Mountain.

The Middle Carter via Zeta Pass starts at Nineteen-Mile Brook Trailhead (Route 16). Check the trail alerts on this page before you drive: trailhead access and parking in the White Mountains change with closures and construction.