After a five-year hiatus, Primal Quest (PQ) makes a comeback. The race is scheduled for 22-29 August 2015 and it takes place in the Lake Tahoe and Sierra Nevada Mountains area (between California and Nevada). The race will be a non-stop, 400+ mile event held over seven days. Entry fee is $8,000 / team.
PQ website is primalquest.org. You can also find them on Facebook as Primal Quest.