San Diego Jam Knot
A West Coast favorite for heavy braid and monofilament. Multiple wraps create a jam knot that grips extremely well on heavier line — the knot of choice for tuna, yellowtail, and offshore fishing.
Video by Sportfishing Report on YouTube
The San Diego Jam Knot is the West Coast standard for tying heavy fluorocarbon leaders (40-130 lb) directly to hooks, jigs, and solid rings — a connection that defeats simpler knots like the Improved Clinch and out-bulks a Palomar at heavy line weights. Named for SoCal yellowtail and tuna fishermen who needed a knot that grips thick, slippery fluoro, it uses 6-7 tight wraps to lock down where lighter knots slip. It's the go-to terminal knot for serious West Coast saltwater anglers chasing big fish around structure.
About the San Diego Jam Knot
The San Diego Jam Knot was developed by West Coast sportfishing anglers who needed a terminal knot strong enough for yellowfin tuna, bluefin, and other hard-fighting Pacific species. Its distinctive feature is a series of wraps that create a 'jam' effect — the harder the pull, the more the knot locks down.
It's particularly popular for connecting heavy fluorocarbon or monofilament leader to hooks and jigs, and works well on braid too. Charter boat deckhands in San Diego use this knot almost exclusively for its reliability under extreme pressure.
Best Used For
Ideal applications
- ✓ Heavy monofilament and fluorocarbon (20-100 lb)
- ✓ Braided line to hooks and jigs
- ✓ Offshore and sportfishing applications
- ✓ Situations requiring maximum jam-lock security
Not ideal for
- ✗ Very light lines under 10 lb (Palomar or improved clinch is easier)
Step-by-Step Instructions
Follow these 5 steps to tie the San Diego Jam Knot. Watch the video above while following along.
Step 1: Thread and extend
Pass 12 inches of line through the hook eye. Hold the hook and extend the tag end parallel to the standing line.
Step 2: Make six wraps away from eye
Wrap the tag end around the standing line six times, working away from the hook eye. Keep wraps tight and even.
Step 3: Bring tag back to eye
After six wraps, bring the tag end back down toward the hook eye.
Step 4: Pass through the eye loop
Pass the tag end through the original loop at the hook eye, from the eye side going up.
Step 5: Pass back through last wrap
Now pass the tag end back through the last wrap you made (the one closest to the eye). Wet thoroughly and pull the standing line to jam the knot tight. Trim the tag end close.
Pro Tips
- Six wraps for 20-50 lb line — use 7-8 for heavier test
- The final pass-through the last wrap is the jam mechanism — don't skip it
- Wet heavily — this knot needs lubrication to seat properly
- Pull hard to fully seat — use a knot puller tool for heavy leaders
Common Mistakes
- Skipping the final pass through the last wrap
- Too few wraps for the line diameter
- Not pulling hard enough to seat — knot must be fully compressed
- Threading through the eye loop from the wrong direction