2016 K-Z Durango 315RKD, The Durango 2500 was created for the experienced RVâ¿¿er who wants all the necessities in an RV and more. Durango 2500 units feature a master bedroom slide-out, solid wood raised panel cabinet doors, and solid surface countertops. The Durango 2500 ranges in length from 33' 6" to 40' 8".