Grand Canyon Rim-to-Rim
Grand Canyon, AZ
Elevation Profile
Current Conditions
Bottom Line
Perfect weather window — sunny and 88°F with light winds through Saturday. Start early (6 AM) to finish the rim-to-rim before afternoon heat peaks. You'll have just under 12 hours of daylight, so maintain 2.5+ mph pace for a 30-mile crossing.
88°/53°F · Sunny
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48" depth
Normal flows · 5 gauges
No active fires within 50 miles
11h 49m daylight · Sunrise 6:44 AM · Sunset 6:34 PM
Full Briefing
This is ideal Grand Canyon weather for March — sunny skies, highs in the upper 80s, and light winds under 10 mph through Saturday. No precipitation expected and clear overnight lows in the mid-50s. The heat will be manageable if you start early and maintain good hydration, but afternoon temps on the canyon floor will push 90°F by 2 PM.
Daylight is your main constraint with sunrise at 6:44 AM and sunset at 6:34 PM giving you 11 hours 49 minutes of light. For a standard rim-to-rim (24 miles), you need to maintain 2+ mph including stops. For the full 30-mile route via the Clear Creek Trail, you'll need 2.5+ mph pace to finish with daylight buffer. Start no later than 6 AM to avoid running the final rim climb in darkness.
Heat management becomes critical after 10 AM when canyon floor temps climb rapidly. The sunny forecast means full solar exposure on switchbacks with no cloud cover relief. Plan water resupply at Bright Angel Creek (mile 14) and Indian Garden (mile 18 on BA trail). Expect to need 1 liter per 2-3 miles in afternoon heat.
Trail conditions should be excellent — no recent precipitation to create mud or washouts, and March temps keep the trail from being dusty. Saturday shows slightly stronger winds (up to 23 mph gusts) but still from the west, which won't create significant headwinds on either rim approach. The weather window extends through your entire trip dates with stable high pressure.
Waypoints
South Kaibab Trailhead
Start from the South Rim. Take the shuttle to the trailhead.
7,201 ft
Phantom Ranch
Refill water at Phantom Ranch canteen. Only guaranteed water in the canyon.
2,402 ft
Cottonwood Campground
Water and restrooms. About 7 miles from the North Rim.
3,999 ft
North Kaibab Trailhead
North Rim finish. Arrange shuttle or have car positioned.
8,241 ft
Route Details
Distance
24.0 mi
Elevation Gain
5,000 ft
Elevation Loss
5,846 ft
Max Elevation
8,241 ft
Estimated Days
0.5
Trailhead
South Kaibab Trailhead
Best Season
Spring and fall ideal. Avoid June-August due to extreme inner canyon heat.
About This Route
The Grand Canyon Rim-to-Rim (R2R) is one of America's most iconic trail running challenges—crossing the Grand Canyon from the North Rim to the South Rim (or vice versa) in a single push. The 24-mile route descends 5,850 feet to the Colorado River, then climbs 4,380 feet to the opposite rim. Most runners go South to North via the Bright Angel Trail down and the North Kaibab Trail up, though the reverse is also popular. The run crosses through five climate zones, from ponderosa pine forest at the rims through desert scrub at the river. The inner canyon can be brutally hot in summer, with temperatures exceeding 110°F at Phantom Ranch. Spring and fall are the optimal seasons. Carry more water than you think you need—at least 3 liters with refill points at Phantom Ranch and Cottonwood. The NPS discourages rim-to-rim day hikes in summer due to heat-related deaths. The R2R2R (rim-to-rim-to-rim) doubles the challenge at 48 miles.
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