Similar to the Fire Tower Brevet, this is one of my target events of the year.  It's ~130+ miles with 10k+ ft of climbing all completed overnight from sunset to sunrise.  You technically can take as long as you want, but the cutoff is sunrise.  

This year will be Sept 20/21 in northwest MA.  No specific location yet but the route is sure to be gnarly since it's being crafted by the legendary Joe Cruz (he made the VTXL route).

2024 ride recap: https://bikepacking.com/plog/markagram-2024-recap/
2023 ride recap: https://bikepacking.com/news/shane-kramer-markagram-2023/

Reg should be opening soon for new riders.  Who's in?