The British Trans Americas Expedition (Darien Gap)

Unofficially known as The Darien Gap expedition, this long distance vehicle expedition made the first ever unbroken journey of the two Americas -- from Anchorage Alaska to Tierra Del Fuego in southern Chile. This drive was over 17,000 miles. But the main obstacle consisted of 100 milers of insect infested, hot, steamy jungle between Panama and Colombia known as El Tapon or The Darien Gap. Many had tried but no one had made it, mainly because the route had to cross fast flowing rivers, traverse mountain ranges and rely on re-supply by air, piraguas (local canoes) and locally procured meat and vegetables.

Our team consisted of 65 people, mostly British army with civilian scientists, a doctor, dentist, veterinarian, nurse and interpreters.
We used two new (at that time) RangeRovers plus an old short wheelbase land rover for reconnaissance and pathfinding. The main team consisted of two recce sections, engineer sections, main headquarters, 27 pack ponies, communication and logistic parties and a Beaver light aircraft. We successfully crossed the Darioen Gap and Great Atrato Swamp in 100 days. This was in 1970/71. We also enlisted the help of the Panamanian Guardia Nationale, US Canal Zone Inter America Geodetic Survey unit and soldiers from the Colombian army.Five of these were unfortunately killed (drowned). 
To my knowledge no one has repeated this entire journey although some have driven from north to south America but bypassed the Darien Gap. 
The leader was Colonel John Blashford-Snell and I was deputy leader.
 

Map showing route through the Darien Gap
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Extremely wet, muddy and hot conditions
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Aluminum ladders used hundreds of times
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River crossings provided much drama
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Piraguas were used for laterally meeting up with the vehicles and for re-supply. I am in the front.
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Flying in the land rover in a Jolly Green giant. Myself, Jim Beattie and John Blashford-Snell
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Typical hardwood in the way. We used Husquarna chain saws.
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A Panamanian Huey flying in new differentials. We went through 17 of them. Helicopters were also used for medivacs on several occasions for illnesses and injuries.
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Choco Indians in the interior
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More chain sawing. We also used dynamite!
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This pathfinder land rover went ahead, pioneering the route.
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Mountains in southern Panama are high, dangerous and very steep
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A world war two disused airstrip, later used for missionaries. We cleared this one and landed our Beaver on it.
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One Range Rover would often winch the second one
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Typical conditions for the three months in the jungle
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The  plinth at Palo de las Letros, marking the border between southern Panama and northern Colombia. I am in the white shirt at the back.
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