Montana – Glacier NP
One of most beautiful National Parks we saw! Wonderful hiking territory. Would go back anytime :-)
Wyoming – Yellowstone NP
Pros: Yellowstone is the most fotogenic NP we visited. Shot tons of fotos! Cons: Average hikes and crowded.
Wyoming – Grand Teton NP
Excellent park for mountaineering and mountain hiking. We stayed too short (two nights) and moved on to less rainier territory.
Colorado – Dinosaur NM
Utah – Arches NP
My favourite park in Utah. The rock formations create an alien, dreamlike scenery, almost like a Dali painting.
Utah – Zion NP
Some nice hikes there. Too bad it was mostly cloudy, so I don't have too many great pics.
More impression from Utah
Nevada – Great Basin NP
Highly UNDER-rated NP. This nice park has almost no visitors, features some impressive caves and, in summer, you can hike up to Wheeler Peak (almost 4000m) and enjoy the view over the Great Basin.
California – Yosemite NP
This park has great hikes and vistas and is a classic destination for climbers. Watch out for food-seeking bears. Cons: the main areas and campgrounds are very crowded. Pros: the situation is much nicer on the trails.