The M Series is the rectangular swim-and-entertain hybrid in the River Pools lineup. A modern rectangular footprint with a dedicated swim lane, an integrated tanning ledge, seating zones for hosting, and an auto-cover-ready coping line. Three sizes: the M25 (10' × 25'), the M30 (12' × 30'), and the M35 (13.6' × 35'). Available in all six River Pools gelcoat finishes. Seven Seas Pools & Spas builds and services the M Series across our region.
Rectangular
3 (M25, M30, M35)
10' × 25' (M25) to 13.6' × 35' (M35)
Dedicated, open down the center
Built into the shallow end
Built-in seating zones for hosting
Yes, coping is engineered for hidden cover tracks
Six gelcoat colors (Arctic, Caribbean, Diamond, California, Maya, Sandstone)
What makes the M Series distinct in the River Pools lineup: it is the only rectangular shell engineered to be a lap pool and a hosting pool at the same time. The R Series gives you all swim space. The D Series gives you swim space plus a tanning ledge. The M Series gives you a dedicated swim lane with the tanning ledge and seating, so morning laps and Saturday-evening hosting both work without compromise.
Explore the River Pools M Series with Seven Seas Pools & Spas and compare the layout, gelcoat finishes, and installation details before you decide.
| Model | Dimensions | Tanning Ledge | Auto-Cover Ready |
|---|---|---|---|
| M25 | 10' × 25' | Yes | Yes |
| M30 | 12' × 30' | Yes | Yes |
| M35 | 13.6' × 35' | Yes | Yes |
All three models share the swim-lane-plus-ledge layout. The choice between them is yard size and swim length: the M35 gives you the longest open lane; the M25 fits the more compact yard while preserving the same dual-use logic.
The M Series interior is organized into two functional zones running parallel to each other:
The swim lane runs down the long axis of the pool. Open floor, consistent slope from shallow to deep, room to push off the wall and swim a straight line.
The tanning ledge sits in the shallow end as a shallow lounging zone. Slip-resistant gelcoat, depth profile that keeps a partially-submerged lounge chair above water.
The two zones share a spillway edge so the water level stays continuous. The result: you don't have to pick between swim and lounge. Both work in the same pool, used at different times.
The M Series coping is built with hidden tracks for an automatic safety cover. The track channel runs the full perimeter; the cover sleeve at the deep end tucks under a low-profile housing or a flush bench. Seven Seas installs the cover at the same time as the shell so the install is one project.
All six River Pools finishes are available on every M Series model:
Arctic
Caribbean
Diamond
California
Maya
Sandstone
Both are rectangular and auto-cover-ready. R is all swim; M adds a tanning ledge and seating. Pick R if you want maximum swim space; pick M if you want lap-swim plus entertain.
Both are rectangular, auto-cover-ready, and ship with a tanning ledge. D prioritizes the tanning ledge as the primary use; M preserves a dedicated swim lane alongside the ledge. Pick D if lounging is the main use; pick M if you want both swim and lounge.
Both are rectangular, auto-cover-ready, and ship with a tanning ledge. X adds the integrated spa; M does not. Pick X if you want the spa; pick M if you want the swim lane.
Both ship with a tanning ledge and an open swim lane. M is strictly rectangular and auto-cover-ready; L is Roman-end and not auto-cover-ready. Pick M if the cover matters; pick L if the Roman entry matters.
Seven Seas Pools & Spas can walk you through the model sizes, gelcoat color options, decking, equipment, and installation details before your project moves forward.
The M30 and M35 are the lap-friendly sizes. The M35 at 35 feet of length is the closest to a casual lap configuration. For dedicated swim training, an Endless Pools swim spa paired with the brand's current jet system gives you continuous swim distance from a smaller yard footprint.
No. The ledge runs in the shallow end as a separate zone; the swim lane runs uninterrupted through the rest of the pool.
No, the X Series spa is molded into the shell at the factory. A standalone hot tub installed next to the M Series pool is the cleanest path if you want both.
The cover passes over the ledge at the coping height, the same way it passes over the rest of the pool. The cover does not rest on the ledge surface.
The M Series is the right answer when you want a pool that swims well and entertains well from the same shell. Call or stop by your local Seven Seas Pools & Spas location to walk through the lineup and see gelcoat samples in person.
5003 Bear Run Road
Cranberry Township, PA
16066
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