[happyjack]

i used to own a chunk of dirt (6 acres) at 11,200 ft under the summit of mt bross in alma. we hiked bross, cameron, lincoln, and democrat all in one day!

bagged a few other 14'ers around the durango area where my sister-in-law lives.

there's a ton of variation in terms of technical climbing vs. simple hiking. all trails is a great app and worth paying for the premium service to download the maps an trail notes if you're going to make this a regular hobby.

as Noneya mentioned, altitude sickness is common at these altitudes. we're sea-level dwellers, so we always tried to stay the first 2 nights in denver before heading up to high elevations. then a third night in the 9k-10K range before going higher. this approach generally seemed to work for me: avoid fatty, salty foods, pre-hydrate, and take a single regular strength tylenol before you set out. carry as much water as you're able, and drink it constantly.