"Trying" is easy in Lightroom. First I make sure that the "Navigator" feature is open. It is located at the top of the left hand panel. Then, below the navigator, is the "Presets" feature. I hover the cursor over the various "Lightroom B&W Filter Presets" and watch how the image in the Navigator changes. If the image has potential, I then create a "Virtual Copy" of the original color image and click on the preset to apply it to the virtual copy. You can then tweak the various sliders on the right hand tool panel to see if you can improve on the preset defaults. Sometimes I can, sometimes I can't.
|The Vermilion River, Kootenay National Park, British Columbia|
I think all of these images were taken on rainy, cloudy, and/or foggy days. It is my experience that dramatic skies come across well as black and whites. Another thing about drab days is that the colors are rather muted (boring?), so converting to black and white makes sense.
|Pyramid Lake, Jasper Alberta|
|Bow River, Jasper National Park, Alberta|
|David Thompson Wilderness|
|Near Athabasca Pass, Canadian Rockies|
|Bow River, Jasper National Park|