In the fall of 1955 a forest fire burned approximately 12,000 acres of merchantable and young growth jack pine on the Sandilands Forest Reserve in southeastern Manitoba. A fact-finding observational study was carried out between 1956 and 1961 to determine the amount and distribution of natural jack pine regeneration occurring in various forest conditions following crown fire. At the same time, general information was obtained regarding some of the factors that appeared to have affected germination, survival, and early growth. More than 99 percent of the seedlings resulted from germination in the spring of 1956. Mortality was almost pronounced during hot dry periods that occurred during the summers of 1957 and 1961. Site was one of the most important of the factors that affected survival and early growth of jack pine. On moderately fresh and moist sites, initial stocking was excellent, mortality was low, and by 1961 well-stocked six-year old stands of regeneration were present. Initial stocking on dry sites was generally adequate; however, as a result of mortality most areas were under-stocked in 1961. Early height growth was best on moist sites and poorest on dry sites. Stand density at the time of fire had an effect on intial stocking on dry sites; best stocking occurred under the harvest canopy. Germination and survival were somewhat related to aspect on the dry site, and in 1961 best stocking generally occured on northerly and easterly aspects. Disking prior to the fire created favorable conditions for germination.