For hiking in heavily wooded terrain, this gps will be very useful. Its high sensitivity GPS (as well as its HotFix satellite system to reduce gps start time) and its intuitive interface will give you all the information you want. This series has a barometric altimeter. The big difference with the Colorado series is the touch screen and use the microSD card instead of SD. Like the Colorado series, they can be used with a heart rate monitor and cadence sensor for pédalage.Il is compatible with optional maps GPS TOPO land, marine BlueChart g2 vision and road are some city navigator.Il models oregon . The 200 which contains the world map background. The 300's barometric altimeter, electronic data wireless, the integrated basemap with shaded relief. The 400t has the European maps at scale 1 / 100000. For models "c" and "i" see my article on colorado. This series allows you to exchange data between two devices with a wireless connection.