i went to the Grand Canyon yesterday.... just for the day. it was a four hour drive each direction but i had to do it because i have come so close to seeing it for so many years and never quite made it. now that i am moving from Az. in a couple of days, i couldn't put it off any more. i have to say it was pretty cool. i hiked down into the canyon for a couple of miles and then turned around and hiked back out. i wish i would have went further but i wasn't sure how long it would take. the 'average estimated time' for the hike i did was supposed to take 4-6 hrs and it was supposed to take longer to hike back out than hike down. i guess i don't fit the average data. took me 3 hours and the hike out was twice as fast as the hike down. fun, but had i known what i was capable of, i would have hiked even further into the big hole in the ground. 
darkram:
Dude, you should have done the National Lampoon's Vacation thing. First time I was there I went to the edge, looked into the canyon, breathed deeply and said, "Alright, let's go".
tita:
Sounds like you're pretty fit Mister! (was there any doubt?) Plus you can totally say "Been there, done that" but with an added "and am way above average" 