Free Shipping & Returns* See Details
Summit Series
Click For Fullscreen





Please select a size
Please enter valid quantity

Buy From An Online Dealer

The color/size of the product you selected is currently unavailable. Either select a different color/size, or purchase through one of our authorized online dealers below.

Find in a TNF Store

notify me when available

Please enter your email so we can alert you when the BASTION 4 in is back in stock. We promise not to spam you. You will only be notified once.

You will earn 8,490 PeakPoints with this product
Members Earn 8,490 PeakPoints LEARN MORE
Lifetime Guarantee

Our products are fully warranted against defects in materials and workmanship with a lifetime guarantee. Exclusions apply*. See Details

Free Returns
Free Returns

Returns are easy! VIPeak Members get free online returns. Everyone gets free returns in-store.



Please enter your "City, State" or "Zip Code" to find stores

Use My Location

Your zip code was not found

Your City, State was not found

Zip code must be 5 digits
Please input "City, State" or "Zip Code"

STORES - Available as of October 27, 2016 10:49:51 AM EDT


A four-person expedition base camp tent that's now lighter, stronger and built to withstand the worst Mother Nature has to offer. Athlete tested to endure the most extreme conditions, in the most extreme places, this new Summit Series® tent serves as a lightweight bomb shelter for stays along your 8,000-meter route. Part of the Summit Series™ collection- the world’s finest alpine equipment.


  • Summit Series™ represents the world’s finest alpine equipment and apparel
  • The updated Bastion 4 is now lighter, stronger and better than ever before
  • 4-person tent with lightweight nylon fly and canopy
  • Fully taped, cut-in nylon bucket floor for added structural strength
  • Dual doors with poled dual-entry front vestibule
  • High-strength reflective guylines with equalizers at multiple attachment points
  • DAC poles and stakes deliver an unparalleled strength-to-weight ratio
  • Polyurethane (PU) port window cold-crack tested to -60°F/-51°C
  • High-low venting with multiple new venting options throughout
  • Glow-in-the-dark, color-coded zipper pulls
  • 10 interior pockets and stuff pockets to quickly stow tent doors
  • Internal hanger loops
  • Four snow stakes included
  • Combination of pole sleeves and clips maximizes strength and ease of pitch
  • Welded reinforcements at critical points on fly
  • Tentertainment compatible (sold separately)
  • Fly Fabric: 40D nylon, 1500 mm PU/silicone coating, water-resistant finish
  • Canopy Fabric: 40D uncoated ripstop nylon, water-resistant finish
  • Floor Fabric: 70D coated nylon, 10000 mm PU coating, water-resistant finish
  • Mesh Fabric: 20D nylon lightweight mesh

Product Specifications

Trail Weight:
13 lbs (5.89 kg)
Fastpack Weight:
7 lbs 10 oz (3.46 kg)
Total Weight:
15 lbs (6.8 kg)
Floor Area:
61.5 sqft (5.7 sqm)
Vestibules Area:
Front: 14.8 sqft (1.4 sqm) Rear: 7.2 sqft (.67 sqm)
Peak Height:
54.5 in (138 cm)
Stuffsack Size:
24" x 9" (61 cm x 22.9 cm)
Sleeping Capacity:
Number of Doors:

compare similar products

Related Products
Guaranteeing campground fun for the family or your ...
Guaranteeing campground fun for the family or your crew of friends this easy-pitch double-vestibule tent sleeps four and features an incredibly spacious interior with ample room to fully stand up. A mesh pocket props up a tablet for nighttime entertainment ...
Head out on backcountry adventures carrying a three-person ...
Head out on backcountry adventures carrying a three-person double-door entry tent that delivers lightweight performance while maximizing internal space. The vaulted head and footbox at either side of the tent improve your clearance while crouching and laying down. On mild ...
Head on a solo mission into the backcountry ...
Head on a solo mission into the backcountry with a one-person tent that delivers lightweight performance without compromising head clearance when you're standing or laying down. On mild days when you camp without the fly the exposed mesh is colorblocked ...
We've taken tent entertainment to a whole new ...
We've taken tent entertainment to a whole new level with this pole and stake bag that doubles as a gear loft a see-through tablet holder portable speaker pocket and a chess board or checkerboard.