Sophie -
i have thru-hiked the AT & PCT back-to-back twice ('96/'97 & '04/'05). If you think that you will have time to hike both trails in the future, most people start with the AT and then hike the PCT, due to the fact that the PCT is longer with a shorter ‘weather’ window and is more technically challenging at times. However, I’ve met a number of people that started with the PCT as their first thru-hike, without having any serious problems. They had the time of their life!
If you started the PCT at the Kickoff, you will inevitably end up running into hordes of hikers for the first few weeks! (I love solo hiking so i start a few weeks before the kickoff and hitch back for the party)
Here’s a couple observations:
(1) The question of which trail is more difficult is incredibly hard to answer: Generally speaking the tread is easier on the PCT (less roots & rocks) and is better graded with easy switchbacks (built for horses), BUT the high Sierra can be extremely tough (and rewarding) in a heavy snow year & northern WA has some challenging sections as well, particulary when it’s wet and cold (often occurring in Sept.) I find that physically, the AT is more rugged as a whole, but mentally, the PCT is considerably more challenging due to the extremes that you will encounter there: hot desert / snow fields at altitude / difficult creek crossings / BAD bugs at times / and LACK of shelters. All things considered, I find the PCT more challenging, especially since you don’t have any shelters to duck into during extreme weather.
(2) Views: If you like open, expansive views you can’t beat the PCT. The AT has wonderful views as well, and perhaps they are even more appreciated since you can’t really take them for granted. The infamous ‘green tunnel’ sections of AT have a beauty all their own - the ‘micro’ views of the plants, moss, trees, etc. is wonderful as well. The spectacular grandeur of the high Sierra and North Cascades is incredible, but so is an open bald in the South, Grayson Highlands in Virginia, the Whites, Maine, Katahdin, etc… Beauty is in the eye of the beholder, i guess, and a mountain doesn’t have to be 14,000 feet high to be beautiful. The PCT is more diverse and spectacular in its beauty, whereas the AT has beautiful hardwood forests, farmlands, quaint villages, etc.
(3) Pace: Its much easier to have a slower pace on the AT. due to a larger weather window. You could feasibly start say on March 1st and finish by October 1st, giving you 7 months to hike roughly 2,200 miles. This works out to a relatively easy 11 - 12 mpd (miles per day) pace given some 'zero’days thrown in here and there. On the PCT, you normally wouldn’t want to head north from Kennedy Meadows before early June unless you have some decent mountaineering skills. This means that most hikers start @ Campo in late April or early May. I personally enjoy starting considerably earlier (last year i started April 8th) to avoid the crowds, enjoy the cooler desert temps, and have a nice leisurly stroll (with lots of zero days) for the first 700 miles. The North Cascades can get tricky by early October, so generally speaking your window on the PCT is around 5 months. At roughly 2660 miles, this works out to 18 - 20 mpd (some zeros thrown in). Sooooooooo, often PCT hikers feel like they have to keep moving, whereas, if you start fairly early on the AT, you could have a bunch of mini vacations in nice spots.
I tend to love spending as much time as possible on a thru-hike, and was able to spend exactly 6 months on the PCT last year on a flip-flop thru-hike ending on the summit of Mt. Whitney (October 9th).
(4) the Finish: nothing beats Katahdin for a finish to a NOBO thru-hike! The border swath and ‘washington’ monument don’t quite match the anticipation and final exuberance of touching the sign at the summit of the big “k”.
Final thought: If you are leaning towards hiking the PCT (sounds like it from your post), then go for it! You’ll have a blast and you will meet lots of wonderful fellow hikers @ the Kickoff. If you have the luxury of doing both trails, then maybe start with the AT first. I get asked quite often which trail i like more & i can honestly say i love both the same, but for very different reasons!
Have a great hike, whichever trail you decide to take!
freebird