Grandmaster Larry Evans (USA) won the $1000 first prize in the seven-round event with the score 6–1.
Expert rating was required for juniors (under age twenty-one); adults needed to be masters.
GM Svetozar Gligorić (Yugoslavia) won the $2000 first prize in the seven-round event with the score 6–1.
Second place was a four-way tie at 5–2 among James Tarjan, Anthony Saidy, Andrew Karklins, and Paul Brandts (all USA).
In the fourth tournament, for the first time an Expert rating was not sufficient for entrance, even for juniors.
Walter Browne (USA and Australia) won with a score of 6–1, the first time the highest rated entrant (2612) was the victor.
The tournament was lengthened to ten rounds, which allowed it for the first time to be rated by FIDE.
In order to enhance title and norm chances for the participants, some flexibility was introduced into the Swiss system pairings in the later rounds.
Evans (USA) placed second at 7–3, and there was a six-way tie at 6½–3½ for positions three through eight among Walter Browne (USA), Florin Gheorghiu (Romania), Weinstein, Oscar Panno (Argentina), Miguel Quinteros (Argentina), and Svetozar Gligorić (Yugoslavia).
The event was returned to the seven-round length, and as a result was expected to be rated only by the USCF as it did not meet FIDE requirements for Swiss system tournaments.
Nona's performance at Lone Pine made her the first woman ever to earn a norm for the title of Grandmaster.
GM Bent Larsen (Denmark) won with 7½–1½, the best score ever in a 9-round Lone Pine tournament.
Svetozar Gligorić and Vladimir Liberzon became the first repeat winners, joined by Vlastimil Hort (Czechoslovakia) and Florin Gheorghiu (Romania) with the score 6½–2½.
GM Viktor Korchnoi topped a field of 61 with the score 7–2 to win the $15,000 first prize.
Three grandmasters tied for second with 6½–2½: Yasser Seirawan (USA), Gennadi Sosonko (Netherlands), and Svetozar Gligorić (Yugoslavia).