Located just outside Hartsel, Colorado, Santa Maria Fly Fishing Ranch offers exclusive access to 1.5 miles of private water on the South Platte River. This historic working ranch delivers a fly fishing experience defined by solitude, healthy trout, and a setting that feels untouched by time. Originally established in 1874, Santa Maria Ranch sits in a wide-open mountain valley where original ranch buildings still stand along the riverbank. These historic structures create a striking backdrop as anglers fish some of the most productive water on the South Platte.
Santa Maria Ranch is deeply rooted in Colorado’s ranching and angling heritage. For generations, the land and water have been carefully managed to support both working agriculture and a thriving river ecosystem. In 2006, extensive stream restoration transformed this stretch of the South Platte River. New riffles, pools, and holding structure were added to enhance trout habitat, increase insect life, and improve overall river health. Today, this section of river is recognized by Colorado Parks and Wildlife for holding more trout biomass per mile than any other river in the state, a reflection of both natural productivity and long-term stewardship. Fishing at Santa Maria Ranch is intentionally limited to preserve the quality of the experience and the health of the fishery. Guests are encouraged to fish thoughtfully, respect the resource, and enjoy the river at its natural pace.
Fly fishing at Santa Maria Ranch takes place on private, walk-and-wade water that allows anglers to fully engage with the river. The fishery supports strong populations of wild Brown and Rainbow Trout, with fish commonly ranging from 8 to 16 inches and larger trout up to 22 inches caught regularly. During the summer and fall months, large migratory brown trout move upstream from Spinney Mountain Reservoir, bringing opportunities to target fish exceeding 26 inches. Depending on conditions, anglers may find success fishing dry flies to rising trout, nymphing productive seams, or swinging streamers through deeper runs and structure. This stretch of the South Platte consistently delivers action in a quiet, scenic, and lightly pressured environment that rewards patience and skill.
Explore highlights from our guided fly fishing adventures,. Our gallery captures authentic moments of connection, learning, and success. Let these images inspire your next escape, and book a personalized trip designed for your goals, pace, and unforgettable days on the water today.



Fly fishing at Santa Maria Ranch is offered on a limited basis to protect the quality of the fishery and the experience. Advance reservations are strongly recommended, especially during peak seasons. If you are looking for private water, professional guiding, and a true Colorado fly fishing experience, Santa Maria Ranch is ready to welcome you. Secure your spot today by clicking the booking button below to reserve your date, ask questions, and begin planning a memorable, expertly guided fly fishing experience tailored just for you.