12pm(now) — Reed Smut
Peak activity at 4pm — Blue Winged Olive (Blue Winged Olive, Weather boost)
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
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Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
The Arlanza rises in the Sierra de la Demanda near Palacios de la Sierra and runs west through the Lara highlands. It's a named Burgos trout/cyprinid system with respectable upper-basin trout water, though a more variable identity than its sibling the Arlanzón. A solid regional river in its own right, but not in the same class as the Arlanzón as a destination.
The Arlanza rises in the Sierra de la Demanda near Palacios de la Sierra and runs west through the Lara highlands.
12pm(now) — Reed Smut
Peak activity at 4pm — Blue Winged Olive (Blue Winged Olive, Weather boost)
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
The Arlanza rises in the Sierra de la Demanda near Palacios de la Sierra and runs west through the Lara highlands. It's a named Burgos trout/cyprinid system with respectable upper-basin trout water, though a more variable identity than its sibling the Arlanzón. A solid regional river in its own right, but not in the same class as the Arlanzón as a destination.
Mayflies
Caddisflies
Gammarids