Take an organised tour of the northern National Parks of the USA, hiking through unbelievable scenery that is home to a rich mix of wildlife. With abundant fresh air and plenty to see you will enjoy walking in the USA’s landscapes of majestic mountains, dramatic geological features, prairies, lakes, forests and glaciers.

Glacier Park

This USA walk begins in a region of spectacular scenery on the border of Canada and the USA, a hiking paradise of stunning mountains, pine forests, and glassy lakes. True to its name, Glacier Park's landscape was carved by huge masses of ice that, unfortunately, are now receding. Scientists have predicted that by 2020 there will be no more glaciers in the park owing to global climate change.

Walkers new to America will be excited to know Glacier Park is home to grizzly bears. Although it can be a treat to see them from a distance, walkers should take care not to disturb them suddenly while hiking. The USA's bears are easily spooked, so it's best to stay upwind, and call out at regular intervals so that they have a warning of your approach. This is especially important when mother bears have their children in tow, because they will protect their young aggressively.

Besides the bears there about sixty other kinds of mammal living in Glacier National Park. These include mysterious creatures like the northern bog lemming, elk, grey wolf, lynx, cougar, wolverine and mountain goat in a mix of animals that is unique in the USA. Walking here is a privilege because of the chance to see these wonderful animals and this amazing environment.

Yellowstone National Park

Four hundred miles to the south is the world's first National Park. It was brought into being by President Ulysses S. Grant in 1872 having only been properly explored twelve years previously. Because of the size of the territory it covers, the park overlaps Wyoming, Montana and Idaho. This means you can cross the borders of three northern states of the USA, hiking the whole time in Yellowstone National Park.

Old Faithful

The National Park features the dramatic Yellowstone Canyon, with its waterfall and river coursing through it, and also one the most famous natural landmarks in the USA. Walking in Yellowstone will put you in a region of three hundred geysers, which includes Old Faithful, the one that can be relied upon to erupt about once every two hours. Geysers spout when hot spring water is superheated by underground magma, and as the water rises to the surface it is constricted to create a pressure capable of blowing steam and water about forty metres into the air.

As well as hot springs and swirling mud-pots, Yellowstone boasts wildlife such as moose, chipmunks, marmots, and eagles to name a few. There are also between two and three thousand bison living here, their population having recovered to healthy numbers.

Grand Teton Park

The tour closes with some hiking in USA's Grand Teton Park, where there are also herds of bison. The Tetons is the name of the mountain range in the park, a series of peaks that dominate the skyline of the park. No doubt you'll continue to take some great photographs here, more mementos of amazing walking in USA's National Parks.