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    1. Home
    2. Fifth wheel trailers
    3. Keystone
    4. Montana
    5. 3857BR
    Keystone Montana 3857BR exterior

    Keystone Montana 3857BR

    Front bedroom, rear living area, loft, desk, mid bunk

    • Rear living area
    • Front bedroom
    • Mid bunk
    • Mid office
    • Mid den
    • Loft
    • Desk
    • Office
    MSRP

    $132,068

    Browse inventory (27)

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    Find a Keystone Montana 3857BR

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    Browse inventory (27)

    Similar floor plans

    Fifth wheel trailers that share features with the Montana 3857BR, like front bedroom, fireplace and washer dryer prep.

    Grand Design Solitude 280RK exterior

    Grand Design Solitude 280RK

    Rear kitchen, walk-thru bath, rear window

    MSRP$116,786

    16 units available

    Grand Design Solitude 280RK floor plan

    RV Envy's expert take

    We like: Coffee bar, Bedroom TV faces bed

    Consider: No washer/dryer, Limited bedroom storage

    Max weight

    15,000 lbs

    Length

    32 ft 7 in

    Sleeps

    4

    Grand Design Solitude 280RK-R exterior

    Grand Design Solitude 280RK-R

    MSRP$116,786

    3 units available

    Grand Design Solitude 280RK-R floor plan
    Max weight

    15,000 lbs

    Length

    32 ft 7 in

    Sleeps

    4

    Highland Ridge Roamer 264RLS exterior

    Highland Ridge Roamer 264RLS

    Rear living area, walk-thru bath

    MSRP$81,743

    3 units available

    Highland Ridge Roamer 264RLS floor plan
    Max weight

    11,800 lbs

    Length

    32 ft 8 in

    Sleeps

    4

    Starcraft GSL 264RLS exterior

    Starcraft GSL 264RLS

    Front bedroom, rear living area, walk-thru bath

    MSRP$74,993

    1 unit available

    Starcraft GSL 264RLS floor plan
    Max weight

    11,800 lbs

    Length

    32 ft 8 in

    Sleeps

    4

    Highland Ridge Silverstar XLT 264RLS exterior

    Highland Ridge Silverstar XLT 264RLS

    MSRP$93,068

    1 unit available

    Highland Ridge Silverstar XLT 264RLS floor plan
    Max weight

    11,500 lbs

    Length

    32 ft 7 in

    Sleeps

    6

    Keystone Montana High Country 281CK exterior

    Keystone Montana High Country 281CK

    MSRP$85,471

    4 units available

    Keystone Montana High Country 281CK floor plan
    Max weight

    14,250 lbs

    Length

    32 ft 2 in

    Sleeps

    4

    Cruiser RV Essence E-28RL exterior

    Cruiser RV Essence E-28RL

    Rear living area

    MSRP$70,455
    Cruiser RV Essence E-28RL floor plan
    Max weight

    11,856 lbs

    Length

    32 ft 9 in

    Sleeps

    6

    Keystone Cougar 260MLE exterior

    Keystone Cougar 260MLE

    Front bedroom, rear kitchen

    MSRP$76,763

    56 units available

    Keystone Cougar 260MLE floor plan
    Max weight

    12,000 lbs

    Length

    30 ft 11 in

    Sleeps

    4

    Other Montana floor plans

    Keystone Montana 3000RE

    MSRPTBD

    2 units available

    Keystone Montana 3000RE floor plan
    Max weight

    16,000 lbs

    Length

    35 ft 5 in

    Sleeps

    5

    Keystone Montana 3100RL

    MSRPTBD

    146 units available

    Keystone Montana 3100RL floor plan
    Length

    35 ft 11 in

    Sleeps

    4

    Keystone Montana 3120RL

    Rear living, kitchen island

    MSRPTBD

    13 units available

    Keystone Montana 3120RL floor plan

    RV Envy's expert take

    We like: Great TV viewing angle, Two awnings

    Consider: Limited bedroom storage

    Max weight

    16,000 lbs

    Length

    35 ft

    Sleeps

    4

    Keystone Montana 3121RL

    Rear living room, kitchen island, master closet

    MSRP$122,318

    32 units available

    Keystone Montana 3121RL floor plan

    RV Envy's expert take

    We like: Ceiling fan, Walk-in closet

    Consider: Limited counter space, Fragile pendant lights, Limited bedroom airflow, Limited kitchen cabinets

    Max weight

    16,350 lbs

    Length

    35 ft

    Sleeps

    4

    Keystone Montana 3123RL

    Front bedroom, rear living area

    MSRP$116,693

    55 units available

    Keystone Montana 3123RL floor plan

    RV Envy's expert take

    Consider: Limited bathroom counter space

    Max weight

    16,350 lbs

    Length

    35 ft 1 in

    Sleeps

    4

    Keystone Montana 3130RE

    MSRPTBD

    6 units available

    Keystone Montana 3130RE floor plan
    Max weight

    16,400 lbs

    Length

    35 ft 2 in

    Sleeps

    4

    Keystone Montana 3160RL

    MSRPTBD

    15 units available

    Keystone Montana 3160RL floor plan
    Max weight

    16,000 lbs

    Length

    35 ft 6 in

    Sleeps

    5

    Keystone Montana 3230CK

    MSRP$96,008

    4 units available

    Keystone Montana 3230CK floor plan
    Max weight

    16,680 lbs

    Length

    37 ft 5 in

    Sleeps

    6

    Keystone Montana 3231CK

    Front bedroom, rear living area, dual vanity

    MSRP$121,013

    57 units available

    Keystone Montana 3231CK floor plan

    RV Envy's expert take

    We like: Bathroom accessible with slides in, Peninsula extending countertop, Good bathroom countertop space

    Consider: Limited bathroom storage, Fragile pendant lights, Very limited living area storage

    Max weight

    16,680 lbs

    Length

    37 ft 5 in

    Sleeps

    4

    Keystone Montana 3440RL

    MSRPTBD

    3 units available

    Keystone Montana 3440RL floor plan
    Max weight

    16,735 lbs

    Length

    39 ft 2 in

    Sleeps

    3

    View all Montana floor plans →
    Keystone Montana 3857BR overview

    Mid-office/loft, rear living, kitchen island

    • Rear living area
    • Front bedroom
    • Mid bunk
    • Mid office
    • Mid den
    • Loft
    • Desk
    • Office
    Keystone Montana 3857BR exterior

    Key facts

    MSRP
    $132,068
    Length
    40 ft 11 in
    Sleeps
    8
    Keystone Montana 3857BR floor plan

    Key facts

    MSRP
    $132,068
    Length
    40 ft 11 in
    Sleeps
    8

    AI summary

    What makes the 3857BR stand out is the way it stacks so many distinct spaces without feeling like a floor plan Tetris puzzle — a rear living area with fireplace, a mid-ship zone that flexes between office and den, a bunk room with a loft above accessed by stairs, and a front King bed suite, all in one unit. The kitchen island with farmhouse sink and solid surface countertops anchors the living end nicely, and the large pantry helps offset the tighter counter space. Washer/dryer prep, an outdoor kitchen, and the Lippert leveling system make extended stays genuinely practical. Keystone backs the structure with a 3-year limited warranty, and the MORryde suspension package — especially with the optional independent suspension upgrade — does real work if you're covering miles to get to your site.

    RV Envy's expert take

    We like...
    • Multi-purpose mid-room
    • Large pantry
    • Loft over bunks
    Things to consider...
    • Limited bathroom storage
    • Limited living area storage
    • Minimal kitchen counter space

    Specs

    Dimensions

    Length
    40 ft 11 in
    Height
    13 ft 5 in
    Width
    8 ft
    Slideouts
    4
    Axles
    2

    Tanks & capacities

    Fresh water
    70 gal
    Gray water
    88 gal
    Black water
    49 gal

    Weight & towing

    Hitch weight
    3,050 lbs

    Accommodations

    Sleeps
    8
    Download brochure

    Available years

    2026202520242023
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    Keystone Montana 3857BR floor plan