The race was run every even-numbered year from 1906 through 1936, except for 10 years during World War I. It then changed to odd-numbered years in 1939 so as not to conflict with the East Coat's Bermuda Race.
Transpac was not raced from 1942 through 1946 during World War II.
The race started in Los Angeles every year except 1928 (Newport Beach), 1923 and 1932 (San Francisco).
The first multiday staggered start of the race was in 1993.
The largest fleet to race Transpac had 80 boats in 1979.
The smallest fleet had two boats in 1932 during the Great Depression.
The largest officially entered yacht to race in Transpac was the 161-foot schooner Goodwill in 1953 and 1959 (with a best time of 10 1/2 days).
The smallest boat to race was the 25-foot sloop Vapor in 1999.
New Zealander Neville Crighton's Reichel Pugh 100-foot Alfa Romeo (as of 2016), holds the elapsed-time record of 5 days, 14 hours, 36 minutes, and 20 seconds.
Two yachts have had the most wins on elapsed time, Lurline (1906, 1908, and 1912), and Morning Star (1949, 1951, and 1955).
Only three foreign boats have won Transpac on elapsed time, the 73-foot ketch Stormvogel, from South Africa in 1967, the Z86 Morning Glory, from Germany in 2005, and the 100-foot Reichel Pugh Alfa Romeo, from New Zealand in 2009.
The longest elapsed time recorded to complete Transpac was 23 days, 23 hours and 55 minutes, set by the 42-foot ketch Viking Childe in 1939.
The only yacht to cross the Diamond Head finish line stern-first was the 78-foot ketch Mir in 1969, when she lost her mast and was backed across the line with her mizzen.
The Spencer 65 sloop Ragtime has raced in Transpac a record 15 times, from 1973 throught 2009.
Although Transpac was traditionally a monohull contest - catamarans and trimarans in the past were not allowed - Buno Peyron's 86-foot catamaran Explorer set a multihull record of 5 days, 9 hours, 18 minutes, and 26 seconds in 1997 as an “invited guest”.