2026 Keystone Montana 3900RK
Fifth Wheel · Luxury Fifth Wheel · sleeps 6
The 2026 Keystone Montana 3900RK is a fifth wheel (luxury fifth wheel). At sleeps 6, it's positioned for buyers comfortable towing with the right tow vehicle.
Floor plan
Photos of the 2026 Keystone Montana 3900RK
Walkthrough video
Video courtesy of Keystone RV Company on YouTube.
Full specifications
Dimensions
| Slide-Outs | 4 |
|---|
Living
| Sleeps | 6 |
|---|---|
| Bunkhouse | No |
Power & Electrical
| Shore Power | 50 A |
|---|
Amenities
| Outdoor Kitchen | No |
|---|---|
| Theater Seating | Yes |
| Residential Fridge | Yes |
| Fireplace | No |
| Four-Season | Yes |
| Off-Road Capable | No |
Similar Fifth Wheels to consider
Other fifth wheels in the catalog with comparable size and price.
Frequently asked questions
How many people does the 2026 Keystone Montana 3900RK sleep?
The 2026 Keystone Montana 3900RK sleeps 6.
Where can I buy the 2026 Keystone Montana 3900RK?
Pirka Wakka is a brand-agnostic catalog and doesn't sell RVs. The "Buy on Keystone" link on this page sends you to the manufacturer's product page — they'll route you to an authorized dealer.
Not sure if the 2026 Keystone Montana 3900RK is right for you?
Tell Matchmaker your trip, your budget, and your tow vehicle. She'll narrow the catalog to the 2-4 RVs that actually fit — verified specs only, no upsells.
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