Our all-girl team travels from sea-level in Australia this August to the tango bars in romantic Buenos Aires, the dusty charms of Lima and into Peru’s magical Huayhuash region to make one of the greatest high altitude treks on Earth.

They will aclimatise for the climbs, icey trails, snowy campsites, trout-filled lakes and scattered farm trails with long days of market shopping, hamster-grilling, mountain biking, massage and day hikes before heading out deep into the northern Andes.

Our 185 circuit of the famous Huayhuash range traverses cascading glaciers, turquoise lakes, alpine meadows and remote communities of Incan descent. Most of the trekking is at altitudes higher than 4,000 metres, the highest point, Punto Cuyoc Pass, a dizzy 5,000 metres after a gruelling sandhill traverse which opens onto the one of the most spectacular panoramas in the range.

From here it's all down hill (literally!) to the Amazon. Girls on Top pack their thermals and their fleeces away and bring out sarongs and bling for a 10-day Amazon adventure. We will fly into the tin shack airport at Iquitos, deep in the jungle where wilderness experts, rescue teams and our friends in the world's greatest jungle will give us a real-life experience of conservation, botany, life style and travel in one of the last of the true wild places on Earth.

There are many great circuit treks of the world but the most magnificent would be around the Cordillera Huayhuash in Northern Peru. A dense collection of towering, fluted peaks over 6000 metres, each has it’s own distinctive character that is alluring not only to mountaineers, but all adventure trekkers.

These mountains are flanked by cascading glaciers, azure blue lakes and alpine meadows containing fragile ecosystems. Few people inhabit the region, just the original indigenous communities that eke out an existence in harmony with the landscape. Our program, a 10-day 165 kilometre circuit of the entire range, crosses five major passes allowing time to acclimatise and fully explore the features of interest enroute. The continual sheer beauty of this mountain circumnavigation is a trekkers and photographer’s paradise.

No doubt at all though - it's a tough, demanding trek at testing altitudes and in scorching and then freezing conditions. However, a steady pace, excellent trekking team and good humoured team will reward our Girls on Top with scenes of unforgettable beauty, chance meetings with children and families from the tiny, scattered villages we skirt past, trout fishing in emerald lakes, incredible views over glaciars, icey peaks and a heaven saturated with stars.

Once we have tested our limits (and perhaps canoed in a hidden lake and taboggoned on an ancient ice slope) we will celebrate in the wonderful, hectic mountain township of Huaraz before making a two-day journey to the tropical wonderland of the Amazon.