Agree with all of this. If this is your first time near big rocks, go around lower terrain. It's awesome scenic either way. Don't do this in IMC. The -235 has 235hp, right? That's probably min HP if you were going near tall rocks. If I had to punch through Colorado, it would be something like HBU VOR -> Marshall pass (or North Pass) -> up the valley some toward AEJ -> Wilkerson pass -> APA. Note that east of Wilkerson pass until about I-25 there are not a lot of landing options if you lose the screw - very hilly.
Things that would make me bail and go via lower terrain route:
- If I didn't understand the effects of density altitude on my wing (ASI) or engine (red knob)
- If I didn’t use the FAA weather cams before the flight to verify conditions (
https://weathercams.faa.gov/)
- if Winds aloft at 9 and/or 12k over 25kts (or even 20)
- If 3k ft above the highest pass puts me in IMC or less than 15 sm viz.. recall mountain weather changes rapidly
- Too much fuel / weight (but still landing with 1hr + fuel at APA). I wouldn't fuel past MTJ and I would not take off with weight more than 90% max gross.
- Unable to hit 1k AGL over the highest pass elevation 5nm before the pass, and the pass is too narrow to 180-it
- Unable to file a VFR flight plan
- ELT not working really well
- Having to fly in the afternoon