Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.
Watch for Sedge towards evening — this could be the best window of the day.
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
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Hatch predictions
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Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Sight-nymphing and technical dry-fly fishing on very clear trout and grayling rivers, with strong mayfly and sedge windows and highly selective fish.
A reasonable day here, though temperature isn't quite in the sweet spot.
Protected natural lake at the Les Rousses station. Brown trout (min 35 cm), rainbow trout stocked. Fly-fishing opportunity in accessible mountain terrain. Spring through early autumn best. Car-accessible alpine lake. Check Haut-Jura regulations for permits and daily catch limits.
WFD classification · FRDR10327
France national rule: grayling opens 3rd Saturday of May in all waters. In 2nd category waters, grayling remains open until 31 December. Departmental regulations may impose earlier closing dates. Always check the relevant département's 2026 arrêté préfectoral.
Protected natural lake at the Les Rousses station.
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.
Watch for Sedge towards evening — this could be the best window of the day.
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Hatch predictions
Top prey shown — see all 5 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Sight-nymphing and technical dry-fly fishing on very clear trout and grayling rivers, with strong mayfly and sedge windows and highly selective fish.
A reasonable day here, though temperature isn't quite in the sweet spot.
Protected natural lake at the Les Rousses station. Brown trout (min 35 cm), rainbow trout stocked. Fly-fishing opportunity in accessible mountain terrain. Spring through early autumn best. Car-accessible alpine lake. Check Haut-Jura regulations for permits and daily catch limits.
WFD classification · FRDR10327
France national rule: grayling opens 3rd Saturday of May in all waters. In 2nd category waters, grayling remains open until 31 December. Departmental regulations may impose earlier closing dates. Always check the relevant département's 2026 arrêté préfectoral.
