Keystone Montana
30 floorplansFifth wheel2018– (in production)Mixed build tier
Keystone (Mixed tier): Keystone's flagship — the best construction in the Keystone stable (laminated walls, aluminum frame, long structural warranty), but Thor-era QC inconsistency keeps the line at mixed.
What one actually costs today: $56,400–$179,600 across the line, new sticker or used estimate per model.
THE FLOORPLANS: 30
| MODEL | YEARS | LENGTH | GVWR | SLEEPS | PRICE TODAY | FINDING ONE |
|---|---|---|---|---|---|---|
| 3100RL | 2026– | 35.9 ft | 19,000 lb | 4 | $160,300 | Findable |
| 3120RL | 2021–21 | 35.0 ft | 16,000 lb | 4 | $56,500used est. | Findable |
| 3121RL | 2018–23 | 35.0 ft | 16,350 lb | 4 | $76,000used est. | Common |
| 3123RL | 2023–26 | 35.1 ft | 16,350 lb | 4 | $84,000used est. | Findable |
| 3230CK | 2021–21 | 37.4 ft | 16,680 lb | 4 | $58,900used est. | Findable |
| 3231CK | 2021–26 | 37.4 ft | 16,680 lb | 4 | $87,100used est. | Common |
| 3531RE | 2024–26 | 38.6 ft | 16,480 lb | 4 | $88,100used est. | Findable |
| 3532SP | 2025–26 | 39.2 ft | 16,500 lb | 4 | $93,500used est. | Findable |
| 3700LK | 2021–21 | 40.5 ft | 16,400 lb | 6 | $56,400used est. | Findable |
| 3740FK | 2021–21 | 40.2 ft | 16,500 lb | 6 | $59,200used est. | Findable |
| 3760FL | 2021–21 | 41.0 ft | 16,800 lb | 6 | $63,800used est. | Findable |
| 3761FL | 2020–26 | 41.0 ft | 18,000 lb | 6 | $93,900used est. | Common |
| 3762BP | 2021–21 | 41.0 ft | 16,980 lb | 6 | $63,800used est. | Findable |
| 3763BP | 2021–23 | 41.0 ft | 16,980 lb | 6 | $84,500used est. | Findable |
| 3780RL | 2021–21 | 41.0 ft | 16,600 lb | 4 | $61,600used est. | Findable |
| 3781RL | 2021–26 | 41.0 ft | 16,600 lb | 4 | $94,000used est. | Common |
| 3791RD | 2021–23 | 40.4 ft | 16,600 lb | 6 | $83,000used est. | Findable |
| 3793RD | 2023–25 | 40.4 ft | 16,600 lb | 6 | $95,800used est. | Findable |
| 3795FK | 2024–26 | 39.9 ft | 17,070 lb | 6 | $96,300used est. | Findable |
| 3800FL | 2026– | 42.6 ft | 19,490 lb | 4 | $179,600 | Findable |
| 3810MS | 2020–20 | 40.8 ft | 16,750 lb | 4 | $57,400used est. | Patient search |
| 3813MS | 2021–23 | 40.8 ft | 16,800 lb | 4 | $79,500used est. | Findable |
| 3854BR | 2021–21 | 40.9 ft | 16,900 lb | 8 | $61,500used est. | Findable |
| 3855BR | 2021–23 | 40.9 ft | 16,900 lb | 8 | $81,700used est. | Findable |
| 3857BR | 2023–26 | 40.9 ft | 16,900 lb | 8 | $94,100used est. | Findable |
| 3900RK | 2026– | 43.8 ft | 19,405 lb | 6 | $175,800 | Findable |
| 3901RK | 2023–26 | 42.3 ft | 16,800 lb | 4 | $96,300used est. | Findable |
| 3915TB | 2024–26 | 43.0 ft | 18,000 lb | 6 | $98,800used est. | Findable |
| 3931FB | 2021–23 | 41.3 ft | 16,500 lb | 4 | $82,300used est. | Findable |
| 3941FO | 2023–26 | 42.6 ft | 18,000 lb | 4 | $98,800used est. | Findable |
THE LINE, YEAR BY YEAR
Assembled from eight-plus model years of brochures, floorplan by floorplan. This is the part a spec sheet can't tell you: which years changed, and which year is the buy.
- 2018Introduced
- 2020GVWR 16,380 to 16,350 lb; hitch 2,385 to 2,350 lb; sleeps rating 6 to 4
- 2020Introduced
- 2020Renumbered 3812MS for 2021
- 2021Introduced
- 2021Renumbered 3121RL for 2022
- 2021Renumbered 3231CK for 2022
- 2021Introduced and dropped the same year
- 2021Renumbered 3761FL for 2022
- 2021Pin weight 2,765 to 2,880 lb
- 2021Renumbered 3763BP for 2022
- 2021Renumbered 3781RL for 2022
- 2021Introduced alongside the 3790RD
- 2021Renumbered 3855BR for 2022
- 2023Discontinued
- 2023Introduced as the 3121RL replacement
- 2023Dropped for 2024
- 2023Replaced by the 3793RD
- 2023Introduced as the 3791RD replacement
- 2023Pin weight up about 510 lb vs the 3791RD
- 2023Replaced by the 3857BR
- 2024Introduced
- 2025Introduced
- 2025GVWR raised 16,800 to 18,000 lb
- 2026Introduced with the redesigned Montana on the heavier 19,000 lb chassis
- 2026Final year; replaced by 3800FL for 2027
- 2026Introduced with the redesigned Montana
Which Montana is the right one, if any?
A line this size hides real differences behind similar names. Set what you care about (weight, bunks, build, budget) as sliders, and watch every floorplan here get ranked against the whole market, not just against each other.
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