Entire industries have been born because of high mountains.
Ever since Whymper's (eventually successful but tragic) attempts to climb the Matterhorn in the Alps, the small Alpine village of Zermatt has mushroomed to what it is now. Similarly for Mont Blanc and Chamonix (and to a lesser extent Courmayeur on the Italian side).
That is the Alps and Europe. High peaks in developing countries generally tend to be in more remote situations and so don't influence one particular town as such but have a more general widesrpread effect. Take Aconcagua in Argentina. Whilst the city of Mendoza is a famous wine growing area and a commercially successful town without mountain twinning, there is no doubt that it has benefited hugely from its proximity to the highest peak in the world outside of the Himalaya.
All this as an introduction to study the effects of Jebel Toubkal 4167, the highest peak in the Moroccan High Atlas and all of North Africa. Marrakech certainly is not dependant on Toubkal but does benefit from trekkers passing through.
Ten years ago, the small Berber village of Imlil was serviced by a dirt track. Now a tarmac road (albeit narrow and subject to rockfall and erosion with every winters rains) brings coachloads of tourists up to this kick-off point for climbing Toubkal or trekking around it. Sir Richard Branson has built an exclusive kashbah / hotel not too far away, whilst a British company have renovated the kasbah overlooking Imlil and turned it into an expensive hotel. Marketing and mountains are not new companions but in this honeypot of the High Atlas, they are indeed very comfortable bedfellows.

Some books have called Imlil the "Chamonix of the Atlas". Hopefully it will never get to that stage of development but it certainly has gone past the point of no-return in committing itself to the fortunes of a mountain just out of sight up the valley. Hotels, guides, mule owners, porters, cafés, shops, tourist boutiques, internet facilities - all within a couple of hundred metres from beginning to end. Most hotels on the main strip are building sites at the moment - extensions, new facilities, complete overhauls.
A few kilometres up the valley, terraced fields are full of crops, almond and cherry trees are blossoming. Life here still seems to be rural, unaffected by the increasingly mass tourism just down the road. The same situation prevailed in Zanskar, north-west India up to 30 years ago. Now all the terraced fields are disintegrating and falling down the hillside as entire villages are or have already become, dependant on trekking and mountaineering tourism. Destroying the very scenery and rural life that many trekkers came to this region to experience.
Let not Imlil and the people of the Mizane valley follow this lead in blindly bowing down to the commercial spirits and euro notes fluttering in the breeze coming from the high mountain, Jebel Toubkal.