Big Agnes Blacktail 4
Floor 96 × 90 in, 50 in peak, vestibules 11 sq ft + 11 sq ft. Drawn to scale from the maker's listing; the grid is 6 in.
- 4 regular padsFits
- 4 wide pads2 in past the wallDoesn't fit
- 4 mummy padsFits
Which pads fit
An inch or more to every wall. Sit-up room +5.9 in.
They don't fit side by side: 2 in past the wall.
An inch or more to every wall. Sit-up room +5.9 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.
Where 4 wide pads fit instead
No other backpacking tent on TentCheck fits them with an inch to every wall. Open them in TentCheck to see where they come close.
Headroom
| Roof overhead | Floor | Share |
|---|---|---|
| Anywhere | 60 sq ft | 100% |
| 12 in or more | 57.4 sq ft | 96% |
| 24 in or more | 49.2 sq ft | 82% |
| 36 in or more | 33.8 sq ft | 56% |
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) | 96 × 90 in, 60 sq ft |
|---|---|
| Peak | 50 in (4 ft 2 in) |
| Vestibules | 11 sq ft + 11 sq ft |
| Sleeps (maker) | 4 |
| Packed weight | 132 oz (8 lb 4 oz) |
| Packed volume | 18.1 L |
| Regular pads that fit | 4 with an inch to every wall |
| Sit-up room on a pad, at the peak | +14 in for 35 in sitting height |
| Pitched footprint | 96 × 152.1 in (8 ft × 12 ft 8 in), floor and vestibules |
| Groundsheet to cut | About 94 × 88 in |
On the campsite
Floor and vestibules together cover 96 × 152.1 in. On a square tent pad, as campgrounds list them: 8 × 8 ft: doesn't fit; 10 × 10 ft: doesn't fit; 12 × 12 ft: doesn't fit. 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 94 × 88 in.
Notes
Floor 90 × 96 in, 50 in peak, two side doors, each with an 11 ft² vestibule. Big Agnes lists the floor as 90 × 96; the doors are drawn on the 96 in sides.
Sources
- Big Agnes: Blacktail 4 Backpacking 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.