For less-hardy riders, there are hiking and biking trails that lead around the steep climb.
Twenty years ago marked its bleakest year, with three equine fatalities and two riders seriously injured.
Yet a change in its refund procedures has many of its most loyal riders (including your correspondent) seething.
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One system tested works out if riders are travelling too fast to negotiate upcoming bends.
Investigators last spring subpoenaed several former U.S. Postal riders, including Mr. Hamilton and cyclist George Hincapie.
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"And among so many riders, it is easy to find good ones, " Mr Corti says.
He described it as a pendulum in which riders are seated in a circle, facing inward.
Madden is the grand champion of bus riders, the winner of the lifetime achievement award.
Over at Greenwich Park, the individual show jumping final put horses and riders through their paces.
Some riders would give up the ghost and say 'what's the point of pushing it?
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Legeay has continued his policy of sticking to predominantly French riders for his team.
Former champion Carl Fogarty saw his Foggy Petronas riders finish well down the field.
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The riders are trotting across the track, and soon they'll be ready to settle the race.
Germany-based Team Coast said it had provided UCI evidence that its riders had been paid.
So riders can now indicate how talkative they are, from "Bla" (quiet) to "BlaBlaBla" (chatty).
The service allows riders to order a taxi from a directly from a smartphone.
The fact that more riders are being caught is testament to the Tour's improved testing regime.
Mr. Khawaja figures that sponsors would line up if only he could attract foreign riders.
The team has adopted the toughest of anti-doping regimes, including fortnightly tests for all its riders.
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To counter this, he sports a mask used by motocross riders in muddy conditions.
He always has that potential for a breakaway and to stun all the riders around.
Without it, free-riders would ruin such groups, because playing fair would cease to have any value.
Liquid cooling allows riders to rev a little higher and hotter in each gear, boosting acceleration.
Hungry farmers and riders eat plates of smoked lamb, potatoes, beetroot and canned peas.
At the time, the Postal Service team said that none of its riders used Actovegin.
Free riders, he said, transferred their own costs to others, either through higher premiums or taxes.
Armstrong was accused of using such drugs by other riders, but never failed a drug test.
Although most of the riders are worn out, they sleep fitfully among the swarming insects.
Before Saturday's two qualifying sessions, there will be one last practice run for the riders.
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