Sequoia Trees are mainly found in a couple parks in California, Sequoia NP, Yosemite NP and maybe Kings Canyon NP (not sure about that one), a long way from Santa Fe.
Sequoia GrovesSo a drive to Rocky Mountain NP, followed by a trip south of there to Pike's Peak. Be careful on Pikes Peak if you aren't familiar with mountain driving. Downshift don't burn out your brakes. That would fulfill your mountain wish. After that there are all sorts of other parks in Colorado. All this depends on how much time you have and the time of year.
Hwy 50 west after Pikes peak to Montrose then south to Durango would run you thru many more impressive mountain, South from Durango would take you into New Mexico.
I'd say a trip to CA to see the big trees would add 6 to 8 days to your drive.
