Top pick
RVMattress.comSignature Hybrid
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
$1,465Queen · list priceSee price
Forest River Flagstaff 301RKS mattress size
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, 2026.
Mattresses in 60 × 80 in
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Best value
Mattress InsiderThe Sedona
- All-foam
- 5.5 in thick
- Firm
$36160" x 80" · list priceSee price
Reviewers' favorite
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 InsiderElation Gel Foam
- Memory foam
- 6 in thick
- cushion firm
$45960" x 80" · list priceSee price
Best hybrid
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$799Queen · list priceSee price
Best all-foam
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 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 Flagstaff bedroom. Measure the platform, not the old mattress, before you buy.
Bed sizes by year
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2026 | 60 × 80 in Queen | – | Second bed 72 × 80 in | 2026 Forest River Flagstaff Classic brochure |
| 2026 | 60 × 80 in Queen | – | – | Forest River spec sheet |
Years not listed weren't published.
The 301RKS floorplan
Forest River's 2026 301RKS floorplan.
Is this your 301RKS?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2026 | Flagstaff Classic F301RKS | 31' 4" | – |
Other Flagstaff mattress sizes
Sources
- recreationalvehicles.info: https://recreationalvehicles.info/2026-forest-river-flagstaff-classic/2026-forest-river-flagstaff-classic-brochure-page-015.jpg
- recreationalvehicles.info: https://recreationalvehicles.info/2026-forest-river-flagstaff-classic/2026-forest-river-flagstaff-classic-brochure-page-012.jpg
Questions
What size mattress is in the Forest River Flagstaff 301RKS?
The main bed is 60 × 80 in (Forest River spec sheet, 2026).