I'm having problems finding a website to convert Lat/Long to UTM coordinates (NAD27). Specifically, I'm using a location from my SPOT on a previous hike in Big Bend National Park for another upcoming hike to Big Bend w/ some Scouts. Google Maps list the location as:
Lat 29.24401
Long -103.27713
When I've tried numerous online conversion calculators, I keep getting error messages.