Check out these links:

Brass Studies at Mississippi State University: www.msubrass.info/

International Horn Society: www.hornsociety.org

Yamaha Horns: usa.yamaha.com/products/musical-instruments/winds/frenchhorns/

Blue Lake Fine Arts Camp: www.bluelake.org

Starkville-MSU Symphony: www.starkvillesymphony.org/