Grand Canyon Rim to Rim

Distance

~21 mi one way~42 mi for R2R2R

Descent

~6,000 ftThen ~5,800 up the other side

Season

May 15 to Oct 15North Rim access window

Permit

None for day travel

Water

Seasonal, and unreliable

Typical R2R2R

9 to 16 hours

The classic route drops the South Kaibab Trail or Bright Angel from the South Rim to the Colorado, crosses at Phantom Ranch, and climbs the North Kaibab Trail 14 miles and 5,800 feet to the North Rim. Twenty-one miles. Doubling back makes it Rim to Rim to Rim, roughly 42 miles and 11,000 feet of climbing, which is the version most ultrarunners mean.

What makes it singular is the inversion. Every mountain day starts with the climb and ends with the descent. Here you spend your freshest hours going down, and the hardest climbing comes when you're already 30 miles in, in the heat, at the bottom of a hole. The canyon rescues dozens of people a year, and almost all of them were fit.

How to get in

• Self-supported
  Just go, as a day trip

  Day hiking and running require no permit, including R2R and R2R2R, as long as you are not camping in the backcountry. There is no entry, no fee beyond park admission, and no organised support of any kind. This is the normal way people do it.

• Permit
  Backcountry permits, if you're stopping

  You only need a backcountry permit if you're camping anywhere other than a developed rim campground. Phantom Ranch dormitory and cabin space is allocated by lottery well in advance and is a lovely way to split the trip into two days.

• Permit
  Organised groups need a permit

  The park has introduced interim permits for organised groups conducting rim-to-rim and extended day hiking or running. If you're leading a commercial trip, a club outing, or a large group, check the current NPS requirement before you plan it.

Check the trail status before anything else

The Grand Canyon's north side has been in flux and it directly affects this route.

• The Dragon Bravo Fire burned over 145,000 acres on the North Rim in 2025 and destroyed roughly 70 structures including the historic Grand Canyon Lodge.
• The North Rim reopened May 15, 2026 with limited services and no overnight lodging on the rim for the 2026 season. The North Rim Campground reopened June 1 with reservations on recreation.gov.
• The North Kaibab Trail is open to foot traffic for the 2026 season, but from 11:59 p.m. on October 15, 2026 it closes between the Redwall Bridge and Cottonwood Campground for Transcanyon Waterline repair. Traditional rim-to-rim travel will not be possible after October 16, 2026.
• Post-fire hazards including debris flows and falling trees are real on the north side.

Multi-year waterline construction has repeatedly closed sections of the corridor trails and shut off water at specific points. Always check the current NPS trail status page before you commit to a date, and again in the week before you go.

Water is the whole problem

People do not fail at Rim to Rim because of fitness. They fail because of water and heat.

• Piped water is seasonal and breaks. Sources at Indian Garden (Havasupai Gardens), Phantom Ranch, Cottonwood, and Manzanita are turned on and off by season and by pipeline failure. Verify each one, by name, for your date.
• Carry a filter regardless. The creek beside the North Kaibab runs most of the season and is your backup when the pipeline is down.
• Carry more capacity than you think for the long dry climb out of the canyon on either side.
• Sodium, not just water. Hyponatremia is a documented Grand Canyon emergency. Drinking heavily without electrolytes in that heat is genuinely dangerous.

Getting your body back to your car

Rim to Rim is point to point across a canyon. The rims are 215 road miles and roughly four and a half hours apart.

• Trans-Canyon Shuttle runs between the rims during the North Rim season and costs around $120 per person. It books out far in advance, especially in the shoulder months. Reserve before you finalise anything else.
• R2R2R solves the problem by running back, which is why so many ultrarunners choose the double.
• Two-car shuffle works if you have a group, but it costs an entire day.
• South Kaibab has no water and no shuttle access for private cars. Park at the Backcountry Information Center and take the free hikers' shuttle.

When to go, and when to start

• May and early October are the classic windows: North Rim open, inner canyon not yet lethal.
• June through August the inner canyon regularly exceeds 105°F. The park actively discourages hiking between 10 a.m. and 4 p.m. in those months, and people die there every year.
• Start before dawn. The standard plan is to be moving by 4 or 5 a.m. so the exposed inner canyon miles happen early.
• Rest in the shade at the bottom. Phantom Ranch has shade, a cantina in season, and water. Sitting for twenty minutes is not weakness, it's strategy.
• Mules have right of way. Step to the inside wall and stand still.

Questions runners actually ask

Go to the source

• NPS North Rim status
• NPS interim permits for organised R2R groups

Entry rules, dates, standards, fees, and odds change every single year, and the interesting races change them the most. Use this guide to build the plan; use the official site to confirm the details before you book anything.

If this is your kind of thing