Agree w/ the PPs that you can keep encouraging her to volunteer in outdoor experiences, lessons to develop as a rider (I assume she's already doing horseback riding?), maybe take family vacations to ranches. When she's in HS, look into summer programs at colleges that have agriculture programs and a job at a barn.
Since you are in MD, you could take her to the annual open house at UMD, Maryland Day. It's next weekend:
https://marylandday.umd.edu/ Their agriculture school has a Agricultural Business Management and Leadership program that might make sense for someone who wants to run a ranch.