Just got sent this by Grand Trophee events (orgs of La Marmotte). Only 43 days notice!, but still thought it interesting revival of an old classic.
http://www.bordeauxparis.com/en/"""
Ultra Cycling Challenge
Experience the ultimate cyclosportive adventure!
The legendary cycling race Bordeaux-Paris rises from its ashes as an ultra-distance cyclist challenge open to all, 35 years after its last professional edition. Created in 1891, Bordeaux - Paris was one of the oldest and longest one-day cycling events in the world. The race's unique character, with a distance of 600 km and a spectacular finish behind a derny, established its reputation as the ultimate cycling challenge suited only to the strongest and bravest riders in the peloton.
...
The distance of 610 km non-stop and 4,000 m of positive elevation are a massive sporting challenge and certainly the highlight of any cyclosportive cycling season, either solo or relay.
"""
Categories are:
- Ultra Rando: 28 - 60 hr
- Ultra Raid: up to 32 hr
- Ultra 2: Two person team, up to 32 hr