This is one of the premier trials for Los Angeles County.

Well known trail: https://trails.lacounty.gov/Trail/53/schabarum-skyline-trail

PDF with trail sections: https://trails.lacounty.gov/Files/QuickGuide/SchabarumSkyline.pdf

London Bridges 50k

This ultramarathon route includes all the London bridges across the River Thames. Starting with Hampton Court Bridge, the route follows the river downstream as the green views give way to urban cityscapes, taking in many of London's greatest sights, before finishing at Tower Bridge.

In total there are 26 bridges, these are all the pedestrian accessible bridges - for obvious reasons the route excludes rail-only bridges. They are as follows (from West to East):