The DuraStone is an original BFE pattern and has been proving itself by catching fish after fish and still being able to pass as a stonefly while other patterns are beat to a pulp!  The DuraStone is a versatile stonefly pattern at the vice too.  The original is tied on a scud hook to imitate a tumbling nymph that has been dislodged from the river bottom.  The size of scud hooks are limited, but for a larger fly the DuraStone is tied on a TMC 200 or equivalent to imitate the larger bugs.  By changing the colors of materials it is possible to tie a fly that represents any type of stones on the water you fish.  You can also adjust the amount of weight to suit your preferences and needs.  Give the DuraStone a go when the big bugs are hatching or as an anchor anytime of year and hold on tight!



  • Hook: TMC 2457 or TMC 200 for larger patterns
  • Thread: UTC 140 (color to match)
  • Weight: 0.20-0.35 lead wire
  • Tail: MFC Speckled Sexi Legs
  • Abdomen: Medium vinyl rib (Permanent marker on top half for lighter colors only)
  • Thorax: Hares ear, Angora goat, or stonefly dub with guard hairs (color to match)
  • Legs: MFC Speckled Sexi Legs
  • Wingcase: Rainy’s Stretch flex covered with Loon UV Knot Sense (Or other UV adhesives or epoxy)
  • Antenna: MFC Speckled Sexi Legs

1Start by securing the hook in your vice and wrap the lead wire you are using.  One note is that you want the wire to start around the barb and extend to one to two hook eye lengths behind the eye to help shape the body.

2Now attach your thread and wrap it back covering the whole hook bend.  Apply a small amount of dubbing and make a ball as shown.

3Take a strand of MFC Speckled Sexi leg and cut ti in half.  Attach one half in front of the dubbing ball you made with one side pointing rearward and one towards the hook eye.  Fold the portion of leg pointing to the eye back and secure it at the original tie in point as shown.

4Wind the thread between the lead wire and tie in point for the tail to create a smooth body and sight taper.  Then tie in the vinyl rib at the end of the lead wire and secure it back to the tail as shown.  Advance your thread forward to just in front of the hook point.  Remember that the vinyl rib will add a lot of bulk and make sure to account for that when making the thread base prior to tying it in.  A note when using lighter colored vinyl ribs that are somewhat transparent, the lead wire will need to be covered with thread wraps to ensure the body stays the correct color and the wire does not show through.

5Next wrap the vinyl rib forward making edge to edge wraps until you reach the point you left your thread.  Secure the vinyl rib and trim off the excess.

6Advance your thread forward and attach the stretch flex and secure it back to the vinyl rib.  Make sure to wrap your thread over the small tag of vinyl rib left over when securing the wingcase.

7Advance your thread to behind the eye and attach the other half of the MFC Speckled Sexi Legs from the tail and attach the antenna the same way you did the tail.

8Apply the dubbing to your thread and dub the thorax back to the vinyl rib.  You will be dubbing the body one more time so do not apply too much.

9Bring your thread to the middle of the thorax.  Cut another piece of MFC Speckled Sexi Legs in half and align the tips.  Put the legs on the top of the thorax and attach with two loose wraps.  Now you can slide the legs into position and secure with a few tighter wraps.

10Apply more dubbing to your thread and wrap it back over the tie in point for the wingcase and back forward to the eye of the hook.  11Fold the wingcase over the thorax and secure it at the eye of the hook.  Leave a small tab of material when you trim the excess.  Pull the antenna back and wrap the thread underneath them.  Then whip finish (it helps if you hold the antenna back while doing this to keep them out of the way) and cut your thread.

12Take a drop of CA glue or head cement and apply it to the tab of wingcase material you left and fold it back onto the the rest of the wingcase as shown.  When tying lighter variations of this pattern with light colored vinyl rib take a permanent marker and color the top half of the abdomen as shown.

13Finally cover the wingcase with Loon UV Knot Sense (other UV adhesives and epoxies will work too).  Bring a little of the adhesive onto the abdomen to create a smoother look.  Now tie on to your tippet and go fish!