Tanner Trail

Tanner Trail

Trails
Last Updated: June 2026

Distance

9

Elevation Gain

4650

Est. Time

4-6 hours down (if moving steady). Plan 12-16 hours for full descent and return. Most hikers bail at 75 Mile Creek Saddle (1.6 miles), a 2-3 hour round trip.

Route Type

Out-and-back

Best Season

October through March

Overview

About This Trail

One of the park's most difficult rim-to-river trails. Descend 9 miles with 4,650 feet of elevation loss and zero water sources—nothing but exposure, heat, and your grit. This barely-maintained route earns the name 'Furnace Flats' for its relentless sun and sparse shade. Expert desert hikers only.

Highlights

Difficulty Level

Expert only

Trail Highlights

Reaching the Colorado River after 9 miles of suffering. The Grand Canyon Supergroup rocks frame the river in colorful striations—rust reds, purples, grays. The only reliable water source. Established campsites on the east bank of Tanner Canyon offer sunrise views of the canyon floor.

Insider Tips

• The 75 Mile Creek Saddle (1.6 miles, 1,700 ft descent) is the realistic day-hike turnaround. It's brutal enough and offers canyon views without full commitment. The descent beyond is exposed and dangerously hot. • Upper section is a navigation puzzle. Cairns mark sections but rockslides erase them. Study the Toroweap-to-Coconino Sandstone transition before you start. • River runners call it 'Furnace Flats' because the silt-laden Colorado reflects heat like a mirror. Waterproof sunscreen is mandatory. • Night-hiking the descent is tempting but deadly—loose rock, eroded edges, exposed scrambles. Never attempt the dark descent. • The 1890s pioneers (Franklin French, Seth Tanner) carved this for miners. It's been 'improved' the same way since: barely.

Best Season to Hike

October through March

Hiking Tips

  • Carry 3-4L water minimum; the Colorado won't appear until Mile 9.
  • Start at dawn; the exposed upper section becomes a furnace after 10am.
  • Scout the upper section carefully—rockslides have erased the trail in places. Study a map before you go.
  • Wear a hat and cool, wet clothing. Core temperature regulation is survival in summer.
  • Plan for descent taking 4-6 hours, ascent taking 8-12 hours minimum.
  • File a detailed trip plan with someone outside the park and check in when you return.
  • Eat 2x your normal calorie intake. Salt and electrolytes are not optional.
  • Winter: Traction devices (microspikes) are essential on icy upper slopes.

Family Info

Not family-friendly. Exposed drop-offs, extreme heat, dehydration hazard, and sustained physical demands make this unsuitable for children or inexperienced hikers. The NPS explicitly states this is 'not a recommended first hike into the canyon.'

What Hikers Say

Hikers who complete this call it one of the park's most punishing descents—9 miles of relentless exposure, heat, and eroded terrain with zero water sources. Most turn back at the 75 Mile Creek Saddle (1.6 miles). Only experienced desert backcountry hikers attempt the full descent; those who reach the Colorado say it's transformative—but not in a fun way.

ℹ️ Data Sources
🏞️ National Park Service 📝 YourNPGuide Editorial

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