Big Agnes Copper Spur UL1
Floor 88 × 38/28 in, 38 in peak, vestibules 9 sq ft. Drawn to scale from the maker's listing; the grid is 6 in.
- A regular padFits
- A wide padFits
- A long wide padFits
Which pads fit
An inch or more to every wall. Sit-up room +1.7 in.
An inch or more to every wall. Sit-up room +1.7 in.
An inch or more to every wall. Sit-up room +1.9 in.
Pads side by side at their listed sizes, with the average man (5 ft 9 in) lying on each. "Tight" is under an inch to a wall or the sloping roof: the fabric gives, but a wet wall wets what touches it. Open it in TentCheck to try your own pads, cots and gear, or read how fits are checked.
Headroom
| Roof overhead | Floor | Share |
|---|---|---|
| Anywhere | 20.2 sq ft | 100% |
| 12 in or more | 18.7 sq ft | 93% |
| 24 in or more | 13.8 sq ft | 68% |
| 36 in or more | 3.4 sq ft | 17% |
From the modeled roof, not measured. About 36 in is where an average adult sits up straight on a pad: a 35 in sitting height, plus the pad.
The numbers
| Floor (listed) | 88 × 38/28 in, 20.2 sq ft |
|---|---|
| Peak | 38 in (3 ft 2 in) |
| Vestibules | 9 sq ft |
| Sleeps (maker) | 1 |
| Packed weight | 38 oz (2 lb 6 oz) |
| Packed volume | 3.7 L |
| Regular pads that fit | 1 with an inch to every wall |
| Sit-up room on a pad, at the peak | +2 in for 35 in sitting height |
| Pitched footprint | 88 × 63 in (7 ft 4 in × 5 ft 3 in), floor and vestibules |
| Groundsheet to cut | About 86 × 36/26 in |
On the campsite
Floor and vestibules together cover 88 × 63 in. On a square tent pad, as campgrounds list them: 8 × 8 ft: fits; 10 × 10 ft: fits; 12 × 12 ft: fits. Guylines and stakes need more room around that.
For a groundsheet, cut it a little smaller than the floor, about 2 in, so rain running off the fly doesn't collect on it and run under the tent: about 86 × 36/26 in.
Notes
Floor 88 × 38/28 in, 38 in peak, one side door with a 9 ft² vestibule. The solo Copper Spur; the most common freestanding shelter in the 2025 PCT hiker survey after the X-Mids and Duplex.
Sources
- Big Agnes: Copper Spur UL1 Ultralight Tent Checked 2026-10-22
Roof shapes are modeled from the floor, the peak and how the poles hold the walls, not measured. Treat a result within an inch or two as too close to call.