Founded by John Marino in 1983 and known as "The Toughest 48 hours in Sport," Silver State 508 is the world's premier weekend ultracycling race. This 508-mile bicycle race is revered the world over for its epic mountain climbs, stark desert scenery, desolate roads, and its reputation as one of the toughest, but most gratifying endurance challenges available, bar none.

The race is held every year in September.

The race is based in Reno, NV and crosses northern Nevada on Highway 50, also known as "The Loneliest Highway in America."