Several times per year the moon is bright enough and at the right angle to create a night rainbow, a “moonbow”, in the mist created by Lower Yosemite Falls.  Many people think that this phenomenon can only be seen and photographed from the bridge below the falls.  While that is the most common place for people to gather and photograph the moonbows, you can see moonbows in waterfall mist whenever the angles are right, so it can pay off to explore other shooting positions.  Even with Lower Yosemite Falls I often find moonbows in the waterfall’s mist as I hike in towards the bridge.  You’re not likely to see the rainbow here with your eyes, so give it a try  with your camera once or twice as you hike in and and as you hike out.

As a starting point for predicting the best times to catch a moonbow in Yosemite, Don Olson of Texas State University has calculated the best times to look for a moonbow from the bridge below Lower Yosemite Falls: http://donolson.wp.txstate.edu/moonbows-lower-yosemite-fall-2016/

If you go to the bridge to photograph the moonbows, please don’t use headlamps, as they throw light uncontrollably all over the other photographers’ shots.  And red lights are the worst, the most inconsiderate for you to use… very difficult to edit out of shots later.  This isn’t astronomy, and you’re not in a darkroom! Please have the simple courtesy to leave the red lights at home.  For seeing your camera controls without destroying your night vision, hold your (dimmed) phone display on top of your camera, facing back at yourself.  Any light of any kind that you sine back at the front of your camera, to see if there is water on the filter for example, will probably appear in the shot of the people next to you.

You can also catch the North Star directly at the top of Yosemite Falls, with the Big Dipper above.  It you have enough patience you can shoot a star trails sequence here, but you’ll probably also catch a lot of flashlights and headlamps as people hike in and out.  Note that moonbows are most typically seen under a nearly-full moon, so if you simply give your eyes a few minutes to adjust, you probably don’t need a headlamp or flashlight to walk in and out on this paved path.  You’ll probably see much more with night-adjusted vision and no light than you would with poorly adjusted vision and a tiny spot of light.  That can even be true under the light of the stars only if you’re in an open enough area for the starlight to shine on the ground around you.

I also found a moonbow in Lower Yosemite Falls (click to enlarge) from the Illouette Falls viewpoint and Four Mile Trail trail head on an earlier after midnight.  No crowds and foreground-destroying red lights here!

There’s virtually no limit to where you can shoot Yosemite moonbows from, if you do a little searching.  And once you know a time that you can get a moonbow from a particular place, you can record the moon direction and elevation and figure out when to return to show other people that unique event.

There were also many reflection opportunities in vernal pools in Cook’s Meadow.  This pool does not exist or it is too low after winters with too little snow, such as 2014.  With the ample snowpack in 2017 I expect reflection opportunities to be exceptional.

I hope that I’ve provided some useful information on Yosemite’s moonbows so you can pursue some interesting and unique shots.  If you want a little extra help, consider joining me for a photography workshop in Yosemite.  I typically visit the park to pursue Horsetail Falls, Moonbows/wildflowers/waterfalls, and fall colors in Yosemite, as well as scheduling workshops that access the High Sierra from Tioga Pass Road.

If you’d like to join me in Yosemite sometime, check my Yosemite photography workshop schedule.  If you can only make it for a subset of the dates, or would like different dates, contact me and maybe we can work something out.

Here’s a time-lapse video I captured of a lunar rainbow at night:

Jeff Sullivan

Jeff Sullivan leads landscape photography workshops in national parks and public lands throughout California and the American West.

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