Analysing terrain data
The exposure grade describes the potential consequences of falling or slipping off the path.
Low Exposure: The path is on completely flat land and potential injury is limited to falling over.
Medium Exposure: The trail contains some obstacles such as outcroppings and rock which could cause injury.
High Exposure: Some trail sections have exposed ledges or steep ascents/descents where falling could cause serious injury.
Extreme Exposure: Some trail sections are extremely exposed where falling will almost certainly result in serious injury or death.
The Flume Trail began life as the grade for a water flume that delivered lumber from high in the mountains above Lake Tahoe to the towns far below.
Nowadays, the remnants of the Flume are still visible, but the old flume bed is instead utilized by mountain bikers and hikers.
This relatively non-technical trail offers incredible views of Lake Tahoe—one of the most beautiful lakes anywhere—from high on the mountainside.
Despite it's non-technical nature, this trail is extremely exposed.
"One slip will be your sure death," writes Tyghe Trimble in Men's Journal. While the classic route to access the Flume Trail begins at Spooner Lake and climbs steeply up the Flume grade, a much more interesting route combination begins by riding miles and miles of one of the best sections of the Tahoe Rim Trail, beginning at Tahoe Meadows.
Rock slabs and rock gardens punctuate this section of the TRT, but overall the trail is still very intermediate-friendly...
as long as you have the fitness for a few stiff, high elevation climbs.
Riding the spine of the mountain range is a euphoric experience, with incredible views in all directions.
Those stiff climbs deliver up some ripping singletrack descending! Unfortunately, the singletrack downhill in this area is short-lived, with much of the elevation loss taking place on dirt roads.
Don't let that deter you, though.
The Tahoe Rim Trail to Flume Trail combination is a must-ride for every mountain biker's bucket list. Sources: https://www.mensjournal.com/adventure/biking-tahoes-flume-trail-20120724/