This old man didn't budge for hours, even had some frost in his cap. Sleeping on his feet. https://t.co/aJ98XXvnnT

- AltYellowstoneNatPar (@AltYelloNatPark) 11:54 AM

https://t.co/XqYXWM0kZ6

- AltYellowstoneNatPar (@AltYelloNatPark) 8:29 AM

Good morning from @AltYelloNatPark Photo credit goes to Ken ? https://t.co/UznH47qWUv

- AltYellowstoneNatPar (@AltYelloNatPark) 8:11 AM

BEAUTIFUL t-storm near Des Moines, NM, complete with a rainbow as well! @ABC7Amarillo @NWSAlbuquerque #nmwx #rainbow https://t.co/ITb0VxxD8M

- Steve Kersh (@SteveKersh7) 5:39 PM

Breaking: @SecretaryZinke recommends no changes to Sand to Snow National Monument in California… https://t.co/6c2ebM0DMr

- US Dept of Interior (@Interior) 1:22 PM

Sunset casts a blue hue @GrandCanyonNPS & it's beautiful! Pic by Isaac Borrego #Arizona https://t.co/E6KwI6BYbA

- US Dept of Interior (@Interior) 5:49 PM

May be one of the most geographically diverse and beautiful states I have ever visited. #azwx #Arizona #StormHour https://t.co/ryyPB9ZQ6u

- Jim Tang (@wxmann) 10:59 PM

An amazing summer moment @RockyNPS by Ron Hazeloop #Colorado https://t.co/ok4izdwQ9u

- US Dept of Interior (@Interior) 9:20 AM

WOW! Double rainbow seen yesterday near the Superstition Mountains east of Phoenix, Arizona. Photo credit: Gary Nic… https://t.co/0FKcCTt8RU

- Mark Tarello (@mark_tarello) 7:00 PM

Colorado looks like a beer ad https://t.co/7ALKqw3Odp

- Burrito Justice (@burritojustice) 5:57 PM

Happy #ColoradoDay everyone, can't wait to visit in November! https://t.co/IVbSjc8LJB

- Denver Broncos UK (@UKBroncosUK) 5:47 AM

Happy 141st birthday #Colorado Proud to call you my home ???? #ColoradoDay https://t.co/ct5RbX09ni

- jenn (@JustJenn_32) 6:00 AM

“Nature gives to every time and season some beauties of its own.” – Charles Dickens #TuesdayThoughts #ColoradoDay https://t.co/4jvA17kX3s

- Return to Nature ?? (@lasttoletudown) 6:48 AM

Happy 141st birthday to the great state of #Colorado! ud83cudf82 #ColoradoDay https://t.co/KXWgAGfQSm

- Chris Daley (@Chris_Daley) 10:18 AM

#ColoradoDay Happy Birthday Colorado! Couldn't ask for a better climate. #RockyMountains #PraiseGod https://t.co/sqb8v63OCG

- Colorado Christian T (@COChristianTees) 9:49 AM

#ColoradoDay Happy Birthday Colorado! #Blessed to live in such a beautiful state. #RockyMountains #TuesdayThoughts https://t.co/NhY0b513u4

- Colorado Christian T (@COChristianTees) 9:52 AM

Does it get any more beautiful than @GrandTetonNPS? Pic by Duane Jurma #Wyoming https://t.co/XZv4R9mvfR

- US Dept of Interior (@Interior) 5:38 PM

Heading back to one of my favorite spots on Earth in October - @ZionNPS Hop Valley. @Interior @NatlParkService https://t.co/ix6lp9G90X

- Brandon Foor (@FoorYourSuccess) 7:17 PM

Flawless dunes & pastel skies: another amazing moment @WhiteSands_NPS. Pic by Jason Roberts #NewMexico https://t.co/W32opKKgSz

- US Dept of Interior (@Interior) 5:39 PM

Some pics from Guanelle Pass in the Rocky Mountains. #rockymountains #denver #colorado #travel #guanellapass https://t.co/I97bMuTQRs

- Hazel (@Hazel_ok) 12:32 PM

Great morning hiking Buffalo Mountain! #exploreco #cowx https://t.co/rb35sv0tUC

- Jennifer Broome (@JenniferBroome) 12:11 PM

Tonights last light in yellowstone is brought to you by all our friends at the USNPS https://t.co/Hz90DELY3G

- AltYellowstoneNatPar (@AltYelloNatPark) Jul-18

The reflections of nature found in Glacier National Park. •••••• Thank you Mr. Snead @j_snead_photography for the …… https://t.co/FklAu8FQgE

- National Park Geek® (@NP_Geek) Jul-15

Happy Statehood day to Wyoming (7/10/1890), home of picturesque Grand Teton National Park! https://t.co/rTQatkgJlS

- USGS (@USGS) 7:15 AM

Amazing lightning show @GrandCanyonNPS by Scott Keelin #Arizona https://t.co/9c8kBS24rE

- US Dept of Interior (@Interior) 9:20 AM

Rocky Mountain view #adobelightroom #alberta #rockymountains #amazingview #mountains https://t.co/EU3dMtVmEO

- Matthew J. Parsons (@M_Parsons_Photo) 2:00 PM

Oh my! #Summer is in full bloom here in #GrandLake! #Colorado #RockyMountains #MountainRetreats https://t.co/B6kTXUx5JH

- ShadowcliffMtnLodge (@ShadowcliffMtn) 2:10 PM

For the weekend's to-do list: Tell @Interior @CommerceGov why marine monuments matter. #MonumentsForAll https://t.co/UifqpXswnG

- Conserve (@howtoconserve) 9:24 AM

Good morning from Yavapai Point #GrandCanyon National Park #FridayFeeling 7/7/2017 #Arizona #FindYourPark -mq https://t.co/LdrTbkniO1

- Grand Canyon NPS (@GrandCanyonNPS) 7:22 AM

5 Hikes To Explore Colorado's Western Slope This Summer: https://t.co/or4xQBId5P more from @NewsCPR https://t.co/3F8WznltNk

- Colo. Public Radio (@COPublicRadio) 7:14 AM