Grand Canyon Rim-to-Rim

Daylight is your primary planning variable. Sunrise is 6:53 AM and the sun drops behind the rim at 5:33 PM, giving you 10 hours 40 minutes of usable light. The full South Rim to North Rim route (roughly 21 miles via North Kaibab) with typical elevation change will take most fit trail runners 7-10 hours moving time — that's workable, but only if you're at the South Kaibab trailhead by 7:00 AM. If you're starting from the North Rim, flip the plan: the North Kaibab descent is longer and you want to run Bright Angel's brutal 4,400-foot climb out of the inner gorge while you're still fresh and before afternoon heat builds in the box canyon. Either way, don't expect a casual start time.

Weather is genuinely excellent. Highs of 68-71°F at the rim translate to warmer conditions in the inner gorge — expect 10-15°F warmer at river level, so low-to-mid 80s at the bottom. That's manageable in November but the canyon's microclimate plus sustained effort means hydration discipline still matters. Phantom Ranch and Bright Angel Creek are your water sources mid-route; don't skip a refill assuming you'll make the next one faster than planned. No thunderstorm risk identified in the forecast — the pattern is high pressure, light westerly winds, and clear skies all three days. This is about as clean a late-season canyon window as you'll find.

The stream crossing data in the raw feed is from California gauges — irrelevant to this route. Bright Angel Creek crossings on the North Kaibab are standard and present no concern at this time of year with stable snowpack at zero inches across all stations. No fires, no smoke, no air quality issues.

For multi-day logistics: if you're staging a shuttle and running point-to-point on successive days, Wednesday looks identical to Tuesday — 71°F, sunny, nearly calm. All three days are green. Get your earliest start on the day you're running the longer or more exposed section. If you're doing the full R2R in a single push, a 6:45 AM start from South Kaibab puts you at the river by roughly 9:30 AM and at the North Rim by early-to-mid afternoon with daylight buffer. That's the move.