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: $62,000–$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	$64,100used est.	Findable
3121RL	2018–23	35.0 ft	16,350 lb	4	$88,900used est.	Common
3123RL	2023–26	35.1 ft	16,350 lb	4	$92,200used est.	Findable
3230CK	2021–21	37.4 ft	16,680 lb	4	$66,800used est.	Findable
3231CK	2021–26	37.4 ft	16,680 lb	4	$95,600used est.	Common
3531RE	2024–26	38.6 ft	16,480 lb	4	$96,700used est.	Findable
3532SP	2025–26	39.2 ft	16,500 lb	4	$102,600used est.	Findable
3700LK	2021–21	40.5 ft	16,400 lb	6	$64,000used est.	Findable
3740FK	2021–21	40.2 ft	16,500 lb	6	$67,200used est.	Findable
3760FL	2021–21	41.0 ft	16,800 lb	6	$72,400used est.	Findable
3761FL	2020–26	41.0 ft	18,000 lb	6	$103,000used est.	Common
3762BP	2021–21	41.0 ft	16,980 lb	6	$72,400used est.	Findable
3763BP	2021–23	41.0 ft	16,980 lb	6	$98,900used est.	Findable
3780RL	2021–21	41.0 ft	16,600 lb	4	$69,900used est.	Findable
3781RL	2021–26	41.0 ft	16,600 lb	4	$103,100used est.	Common
3791RD	2021–23	40.4 ft	16,600 lb	6	$97,100used est.	Findable
3793RD	2023–25	40.4 ft	16,600 lb	6	$105,100used est.	Findable
3795FK	2024–26	39.9 ft	17,070 lb	6	$105,700used est.	Findable
3800FL	2026–	42.6 ft	19,490 lb	4	$179,600	Findable
3810MS	2020–20	40.8 ft	16,750 lb	4	$62,000used est.	Patient search
3813MS	2021–23	40.8 ft	16,800 lb	4	$93,000used est.	Findable
3854BR	2021–21	40.9 ft	16,900 lb	8	$69,800used est.	Findable
3855BR	2021–23	40.9 ft	16,900 lb	8	$95,500used est.	Findable
3857BR	2023–26	40.9 ft	16,900 lb	8	$103,200used est.	Findable
3900RK	2026–	43.8 ft	19,405 lb	6	$175,800	Findable
3901RK	2023–26	42.3 ft	16,800 lb	4	$105,700used est.	Findable
3915TB	2024–26	43.0 ft	18,000 lb	6	$108,400used est.	Findable
3931FB	2021–23	41.3 ft	16,500 lb	4	$96,300used est.	Findable
3941FO	2023–26	42.6 ft	18,000 lb	4	$108,400used 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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