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Item # STSCE201

Sea to Summit Alto TR1 3-Season Backpacking Tent

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Sea to Summit Alto TR1 3-Season Backpacking Tent

By Cheyne

Enwild Gear Specialist

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Weighing just 2 pounds, 1 ounce, the semi-freestanding Sea to Summit Alto TR1 tent offers the packed size and weight to appeal to ounce-counting solo backpackers while still providing a host of unique design features and uncompromising internal livability.


Weighing just 2 pounds, 1 ounce, the semi-freestanding Sea to Summit Alto TR1 tent offers the packed size and weight to appeal to ounce-counting solo backpackers while still providing a host of unique design features and uncompromising internal livability.

This solo tent measures 84.5" x 42" at its widest point. To save weight, it tapers to 24" at the feet which still results in overall interior space of 19.5 square feet. Unique pole geometry creates 42.5" of overhead peak height and increases the steepness of the side walls to provide a wealth of internal elbow room. The tall single door offers easy entry, and an integrated vestibule provides 7.5 square feet of protected external space. Sea to Summit also offers the custom-fit Alto TR1 Gear Loft (sold separately) to repurpose the unused space near the foot of the tent to provide internal storage for clothes and gear.

Premium DAC TH72M aluminum poles grant the tent reliable structure though lightweight, strong Ground Control Light Tent pegs are included to ensure a stable pitch. A Tension Ridge pole running across the roof of the tent curves upward to create the livable interior space, the ample headroom, and the roomy vestibules. The 15D polyester mesh tent walls keep out bugs while also allowing airflow to combat condensation. Working in tandem with the Tension Ridge, ceiling vents in the PeU-coated 15D nylon rainfly further enhance airflow without compromising weather protection. These vents can be closed from inside if you want to batten the hatches and integrated vents at the floor of the tent can still ward off condensation. The 6" deep 15D nylon tub-style floor ensures weather-resistant protection. Two types of footprints are also available (but sold separately) to add increased protection. The Alto TR1 Lightfoot protects the interior floor of the tent from sharp objects, mud, and ground water while the Alto TR1 Bigfoot accomplishes the same but actually extends protection to create floors inside both vestibules too. By using the poles and the rainfly with either of the footprints, you can shed the weight of the inner tent body in fair weather and enjoy an even lighter weight set-up.

The tent incorporates several other unique features. Its FairShare storage system allows you to pack the tent into a single 4.3" x 17.7" unit or divide it three ways to share the weight amongst multiple backpackers or to just give you flexibility on how you carry it. These individual compartments can also be utilized as clip-in gear storage pockets when the tent is pitched. The pole bag has a rigid, translucent side that helps turn it into a Lightbar of ambient light for the interior of your tent when paired with a headlamp (headlamp not included). It clips directly into the ceiling of the inner tent body to provide soft, even overhead lighting.

  • Tension Ridge raises the tent's shape upwards for more usable head-and-shoulder space and creates higher doors for easier entry and more vestibule storage
  • Color-coded ultra-strong lightweight DAC NSL pole set and quick connect pole feet make for easy setup
  • Made for longevity and waterproof performance by using premium materials including DAC poles, YKK zippers, 7-series aluminum hardware and seam-taped PeU-coated rainfly
  • FairShare storage system: tent packs into 3 stuff sacks to split the load. After set-up, stuff sacks transform into gear storage pockets
  • Lightbar: add a headlamp (sold separately) and secure the tent pole storage sack to the apex of the tent for soft even illuminationRainfly can be set up first for a dry setup and takedown
  • Includes 9 Ground Control Light Tent Pegs and 4 removable Ground Control Guy Lines with custom attachment toggles
  • To extend the life of your tent floor Sea to Summit recommends using the Alto TR1 Lightfoot or Alto TR1 Bigfoot footprint (both sold separately)
  • The Alto TR1 Gear Loft (also sold separately) provide custom-fit, out-of-the-way internal gear storage.
California residents: view proposition 65  Warning

Technical Specs

Best Use
Average Min Weight
2 lb 1 oz
Average Packed Weight
2 lb 7.2 oz
Clips Or Sleeves
Floor Area
19.5 sq ft
Floor Dimension
84.5" x 42" (at widest point)
Interior Height
Interior Storage
Stuff Sacks convert to interal pockets
Number Of Poles
1 hubbed
Pole Diameter
8.7mm and 9.5mm
Pole Type
DAC TH72M Aluminum
Seam Sealed
Taped Seams
Vestibule Area
7.5 sq ft
Pole stuff sack converts to internal LightBar (requires headlamp)
Limited Lifetime
Walls: 15D polyester mesh
Rainfly: Silicone/PeU coated 15D nylon
Floor: 15D nylon 1200mm
Packed Size
4.3" x 17.7"

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