When it comes to outdoor watches, it's hard to beat the Casio Pro Trek series. Their latest model is the first to use their STN (super-twisted nematic) display, which uses less power while delivering visibility in both bright and dark environments. Other features include their latest Triple Sensor tech for accurate altimeter/barometer readings and alarms for sudden pressure changes and Tough Solar technology for months and months of battery life that can even charge under the light of a fluorescent lamp. 

$320, casio.com