rigsize

Forest River Sierra 403RD mattress size

Years 2020–2025Sold as Sierra DestinationLength 42' 0"
60 in 80 in
To scale. Dashed: a regular queen.
Main bed60 × 80 inQueen

That's the same size as a regular queen, so any standard queen mattress fits.

About the RV queen size →

Forest River spec sheet, 2023.

Mattresses in 60 × 80 in

We may earn a commission when you buy through some of these links. It doesn't change which mattresses we list.

Top pick
RVMattress.com Signature Hybrid

RVMattress.comSignature Hybrid

  • Hybrid
  • 13.25 in thick
  • Soft / Medium / Firm

Sleep Foundation: Best Mattress Overall Read review

$1,465Queen · list priceSee price
Best value
Mattress Insider The Sedona

Mattress InsiderThe Sedona

  • All-foam
  • 5.5 in thick
  • Firm
$36160" x 80" · list priceSee price
Reviewers' favorite
RVMattress.com Aurora Luxe Cooling

RVMattress.comAurora Luxe Cooling

  • Hybrid
  • 13.25 in thick
  • Soft / Medium / Firm

Sleep Foundation: Best Mattress for Temperature Regulation Read review

$1,999Queen · list priceSee price
Best memory foam
Mattress Insider Elation Gel Foam

Mattress InsiderElation Gel Foam

  • Memory foam
  • 6 in thick
  • cushion firm
$45960" x 80" · list priceSee price
Best hybrid
RVMattress.com CopperFlex RV Hybrid

RVMattress.comCopperFlex RV Hybrid

  • Hybrid
  • 10 in thick
  • Medium-Firm
$799Queen · list priceSee price
Best all-foam
RVMattress.com Plank Firm

RVMattress.comPlank Firm

  • All-foam
  • 10 in thick
  • Firm / Extra Firm

Mattress Clarity: Best RV Mattress for Heavy People Read review

$1,332Queen · list priceSee price
Reviewer pick

HelixHelix Midnight

  • Hybrid
  • 11.5 in thick
  • Medium Feel

Sleep Foundation: Best Mattress for Side Sleepers Read review

$1,183Queen · list priceSee price
Reviewer pick
Mattress Insider Park Meadow Encased Coil II

Mattress InsiderPark Meadow Encased Coil II

  • Hybrid
  • 8 in thick
  • cushion-firm

Sleep Foundation: Best Mattress for Pressure Relief Read review

$66960" x 80" · list priceSee price

The 403RD floorplan

Forest River Sierra 403RD floorplan, 2023

Forest River's 2023 403RD floorplan.

Is this your 403RD?

Check the year and length against your RV before you order.

YearModelLengthSleeps
2020Sierra Destination 403RD42' 3"–
2023Sierra Destination 403RD42' 0"–
2024Sierra Destination 403RD42' 0"–
2025Sierra Destination 403RD42' 0"–

Other Sierra mattress sizes

40DUPLEX399LOFT420FLAll Sierra floorplans

Sources

  1. Forest River (forestriverinc.com), archived copy: https://web.archive.org/web/20190922212051/https://forestriverinc.com/rvs/destination-trailers/sierra-destination/403RD/3996
  2. Forest River (forestriverinc.com), archived copy: https://web.archive.org/web/20221206182229/https://forestriverinc.com/rvs/destination-trailers/sierra-destination/403RD/6453
  3. Forest River (forestriverinc.com), archived copy: https://web.archive.org/web/20221206180845/https://forestriverinc.com/ImageHandler.ashx?ImageID=221107
  4. Forest River (forestriverinc.com), archived copy: https://web.archive.org/web/20240529110308/https://forestriverinc.com/rvs/sierra-destination/403RD/8261
  5. Forest River (forestriverinc.com), archived copy: https://web.archive.org/web/20250808052028/https://forestriverinc.com/rvs/sierra-destination/403RD/10036

Questions

What size mattress is in the Forest River Sierra 403RD?

The main bed is 60 × 80 in (Forest River spec sheet, 2023).