Mountain Ram Adventures: 2015

Great Himalayan Trail (Nepal)

Distance: 1,700 kilometers (1,056 miles)

In a word: ambitious.

Still being put together, when finished, this 4,500 kilometer (2,796 mile) skyscraping traverse will be the longest and highest mountain trail in the world, crossing the entire Himalaya range from Kashmir to Tibet, via India, Nepal and Bhutan.

Nepal's section is the most complete and it alone offers one of the great trekking challenges.

It's split into Low and High routes that run near parallel, beginning either side of Kanchenjunga Base Camp and ending on the Tibetan border in Humla.

For high culture, the low route (still averaging 2,000 meters in height) passes through remote Nepali villages dotted along the hills and valleys.

Only those with mountaineering experience should attempt the high route -- it peaks at a breathless 6,146 meters (20,164 feet).

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