It is possible but not practical. Front Range Colorado is USDA Hardiness Zones 4 and 5. Peanuts are tropical plants. In addition to growing in a different climate, peanuts require a longer growing season than we have in Colorado. You might extend the season by starting annual peanuts indoors and transplanting them outdoors when the soil has warmed. A loose, sandy soil is required. Row covers or frost blankets can be used in spring to protect tender transplants and in fall to keep plants alive at the end of the season while the peanuts mature.