rigsize

Heartland Milestone 317RL mattress size

Years 2020–2021Sold as MilestoneLength 35'9"
70 in 80 in
To scale. Dashed: a regular queen.
Main bed70 × 80 inRV king

That's an RV king, 6 in narrower than a regular king (76 × 80 in). A regular king won't fit, so get an RV king in exactly 70 × 80 in.

About the RV king size →

Heartland spec sheet, 2021.

Mattresses in 70 × 80 in

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

Great all around
RVMattress.com Signature Hybrid

RVMattress.comSignature Hybrid

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

Sleep Foundation: Best Mattress Overall Read review

$1,865RV King - 70x80 · list priceSee price
Best value
RVMattress.com CopperFlex Essential

RVMattress.comCopperFlex Essential

  • All-foam
  • 6 in thick
  • five comfort options
$799RV King - 70x80 · list priceSee price
Firm
RVMattress.com Plank Firm Luxe

RVMattress.comPlank Firm Luxe

  • Hybrid
  • 13 in thick
  • Firm / Extra Firm
$1,865RV King - 70x80 · list priceSee price
Cooling
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

$2,465RV King - 70x80 · list priceSee price
RV hybrid
RVMattress.com CopperFlex RV Hybrid

RVMattress.comCopperFlex RV Hybrid

  • Hybrid
  • 10 in thick
  • Medium-Firm
$1,065RV King - 70x80 · list priceSee price
Custom size
Mattress Insider Luxury Gel Memory Foam

Mattress InsiderLuxury Gel Memory Foam

  • Memory foam
  • 8 in thick
  • not stated
Made to 70 × 80 inGet a quote
Bedroom in a Milestone

The Milestone bedroom. Measure the platform, not the old mattress, before you buy.

Bed sizes by year

YearMain bedBunksOther bedsSource
201970 × 80 in King––recreationalvehicles.info
202170 × 80 in King––recreationalvehicles.info
202170 × 80 in King––Heartland spec sheet

Years not listed weren't published.

Is this your 317RL?

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

YearModelLengthSleeps
2020Milestone 317RL34'-8"5-6
2021Milestone 317RL35'9"–

Other Milestone mattress sizes

Sources

  1. Heartland (heartlandrvs.com): https://heartlandrvs.com/wp-content/uploads/2021/03/Heartland_Brochure_MI_4P-3-29.pdf
  2. Heartland (heartlandrvs.com), archived copy: https://web.archive.org/web/20200930091532/https://heartlandrvs.com/2020/fifth-wheel/milestone/milestone-317rl/

Questions

What size mattress is in the Heartland Milestone 317RL?

The main bed is 70 × 80 in (Heartland spec sheet, 2021).