The "QRP" morse code radio could be a good option, PROVIDED that the user was LICENSED to operate it in their country.
Morse (or "CW") can be used at low power levels (2-5 watts) with a wire dipole antenna and get decent daytime results, on say 7.050 mHz out to four or five hundred miles, and night time results of thousands of miles under good atmospheric conditions.
I am licenced to operate that radio, and if I were a avid hiker, would take a solar rechargable battery and that rig with me.
The total weight would be less than say 7 pounds.
Not bad insurance if you get turned around in a canyon or two and find yourself low on food and water.
Sat phones are expensive, cell phones can be unreliable in wilderness areas.
Morse code cuts through the clutter and saves lives.
Read here:
http://www.arrl.org68ROX
K5TEN, ex-KA9SOX, ex-KA9SOX/VE1, ex-KA9SOX/VE3, ex-KA0NIU