Scoring is based on the number and length of fish caught and released, with all measurements recorded by official guides to ensure accuracy and fairness. Points are awarded for each fish landed, with bonus points given for larger specimens, and teams can track their progress through real-time score updates posted throughout each event day. The Jackson Hole One Fly uses a self-policing system built on honor and integrity, where anglers are trusted to follow all rules while guides serve as official scorekeepers for this prestigious event.

1. The One Fly scoring procedures are designed to reduce the handling of our trout.

2. Each angler will be allowed to select eight (8) trout to measure during the day. Six (6) of these fish will have a bonus score. All trout not selected for measurement will be released immediately, preferably without removing them from the water. The decision to measure a trout must be made before subjecting the fish to an official measurement and, again, only 8 trout can be selected for measurement.

3. The GUIDE must measure any and all fish that are selected for measurement in order to determine a bonus score for that fish. For the avoidance of doubt, any fish not measured by the guide will not receive a bonus score.

4. To be counted in the score, the release of a caught trout must be witnessed by the guide. Each of these trout will have a value of two points. If the angler or the guide touches the leader while a fish is “on”, then that fish is counted as two points.

5. All trout, including foul hooked trout, are counted unless the angler intentionally foul hooks the fish. It is up to the guide to determine if the fish was foul hooked intentionally.

6. Measurement of trout shall be done by the guide while the trout is in the water whenever possible. The guide should measure the trout with the fish placed headfirst into the trough provided to the guide, a Fishscale on the rod or net handle, a ruler, tape measure or like device. Fish are to be measured from the tip of the nose to the tip of the relaxed tail. The tail of the trout should not be pinched. All trout should be measured to the nearest 1/4 inch, to ensure accurate measurements for the biggest fish event. Measurements should not be rounded up by the guides. In signing the scorecard, the angler understands that this represents only an estimate of their final score. Scores will be finalized by the scoring committee, due to rounding of fish length and/or incorrect addition of total points.

7. A penalty will be assessed for any fish killed or ruled by the guide to be unable to survive. Each of these fish will be measured and the scored value of that trout will be subtracted from the angler’s score. That trout will not be counted against the daily limit of six measured trout.

8. Twenty-five points will be awarded for each day that an angler keeps his event fly all day.