Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Stream photos

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Male Baetidae (Blue-Winged Olive) Mayfly Dun Male Baetidae (Blue-Winged Olive) Mayfly Dun

Lateral view of a Male Baetidae (Blue-Winged Olive) Mayfly Dun from Mystery Creek #308 in Washington

This dun emerged from a mature nymph on my desk. Unfortunately its wings didn't perfectly dry out.

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27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

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USGS Topo Maps

Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197

Shawnny3 on Jun 27, 2011June 27th, 2011, 7:03 am EDT

I don't know how many of you guys knew about this (probably everyone but me!), but the USGS recently began production of enhanced topo maps. They've currently mapped about half the states and are at varying degrees of completion with each. They've released each 7.5' x 7.5' quadrangle in PDF format using layers to show different types of data (added to this most recent release for the first time is a hydrographic layer!). You can turn on or off each type of layer with a simple toggle. The quadrangles are available for free download. I found they are each 10-20 MB in size. There is a toolbar you can also download (called TerraGo) that will enable you to interact with and personalize each map by marking spots, making notes, measuring distances and areas, and even track positions using your GPS. This seems like just the sort of tool a flyfisherman would find really useful. I'm pretty excited about it - Pennsylvania just got finished! Check it out here:

http://nationalmap.gov/ustopo/about.html#status

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