Reading this post made me wonder - would be a real challenge to hike Whitney AND do R2R in the same day. (Would also mention that in the summer, Arizona is on the same time as California). Looks like the distance betweeen Whitney Portal and the Grand Canyon is 490 miles for the North Rim and 520 miles for the South Rim. Seems like this drive could be completed in ~7.5 hours (per Google maps). Super fast hiking times for Whitney Portal and R2R are both around ~8 hours.
So conceivably, a day could look like this:
12am-8am: Whitney Hike
8am-3:30pm: Whitney to GC North Rim
3:30pm-12am: R2R
Would be a fun challenge - wonder if it's ever been attempted.
My brother and I are trying the Whitney/Canyon duo this year. 1st north rim to south rim June 1&2, staying at Phantom Ranch. Staying in Barstow on June 2, then have an overnight Whitney permit for June 3rd. Not quite 1 day, probably 3.5 days from start to finish. We started with just the Grand Canyon plans and got lucky on the whitney lottery. Gear packing for both is a challenge in itself.
