Home - Trail King Industries trailers, heavy haul, specialized trailers, trailers for sale, lowboy, trailer manufacturing, best trailers, trail king, trail king trailers, hauling, lowboy life, heavy duty trailers, quality trailer Trail King Industries, Inc., headquartered in Mitchell, SD, is the leading North American manufacturer of a complete line of trailers. We design, engineer, and manufacture trailers to serve a wide variety of applications for diverse markets, including construction, agriculture, transportation, waste and recycling, and specialized hauling. Over the years, we’ve built a reputation for unsurpassed quality, reliability, and performance.