Foothills Mystery Quilt - HSTs

Foothills Mystery Quilt {HSTs}


We just rolled our calendars over to another month, which means another set of instructions have been posted in the Foothills Mystery Quilt hosted by Cheryl @ Meadow Mist Designs. You can check out my previous history in the Mystery Quilt series in these posts:

  1. Foothills Mystery Quilt {Fabric Selection}
  2. Foothills Mystery Quilt {Fabric Cutting}

This month, we are to make 144 Half Square Triangles (HSTs). That’s a lot! I thought I might spread the work out over a few days when I got started piecing, pressing, and trimming this morning, but I am happy to say it actually went much faster than I thought it would. Overall, I spent about 3.5 hours making these HSTs.

Foothills Mystery Quilt - 144 HSTs (3.5" x 3.5")
Foothills Mystery Quilt – 144 HSTs (3.5″ x 3.5″)

Each stack in the image above has 12 3.5″ by 3.5″ trimmed HSTs. Aren’t they pretty?

Foothills Mystery Quilt - HSTs
Foothills Mystery Quilt – HSTs

Each trimmed HST had 4 edges to square up. That means I made 576 cuts just to square the HSTs. I am glad I broke up the sewing, pressing, and cutting. I chain pieced one yellow fabric worth of blocks (24 HSTs worth), then I press set the seams, cut the HSTs apart (the instructions were to sew 2 HSTs at once from a square and then trim on the center diagonal), then I pressed the HSTs open, and finally I trimmed each set of 24 down to size. I did half in the morning and half in the afternoon.

Foothills Mystery Quilt - HSTs
Foothills Mystery Quilt – HSTs

And with all that trimming, I undercut one HST at 3″ wide instead of 3.5″. Oops. Thankfully I had precut lots of extra black background fabric and one extra yellow square for each yellow fabric. I was definitely getting tired at the end, because that is when I made the trimming mistake (with only 18 blocks left to trim). Another month done and I am looking forward to seeing what others in the group are creating!


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