Utah stocking report
MAMMOTH CR
144 records Last stocked: June 23, 2026
The short answer
MAMMOTH CR was last stocked on June 23, 2026: 242 Rainbow Trout (10.54 in avg).
Location map
MAMMOTH CR location context
MAMMOTH CRGarfield County PANGUITCH LGarfield County GRASS L SBGarfield County NORTH CR RESGarfield County LITTLE ANTIMONY EMWGarfield County
Pins use the finest location published with the stocking record. County-level pins show area context, not an exact access point; confirm access and directions with the official agency source.
Looking for a different MAMMOTH CR? Also on record: MAMMOTH CR (IRON County, Utah)
Agency records
Full stocking history
| Date | Species | Fish | Size |
|---|---|---|---|
| June 23, 2026 | Rainbow Trout | 242 | 10.54 in avg |
| May 20, 2026 | Tiger Trout | 500 | 10.19 in avg |
| May 18, 2026 | Rainbow Trout | 260 | 10.12 in avg |
| May 6, 2026 | Brown Trout | 3,046 | 3.28 in avg |
| July 8, 2025 | Rainbow Trout | 251 | 10.51 in avg |
| June 4, 2025 | Tiger Trout | 511 | 9.21 in avg |
| May 28, 2025 | Brown Trout | 3,780 | 4.11 in avg |
| May 28, 2025 | Rainbow Trout | 252 | 10.21 in avg |
| July 18, 2024 | Rainbow Trout | 260 | 9.83 in avg |
| June 12, 2024 | Tiger Trout | 501 | 8.99 in avg |
| May 14, 2024 | Brown Trout | 3,185 | 3.46 in avg |
| May 14, 2024 | Rainbow Trout | 258 | 10.47 in avg |
| July 20, 2023 | Rainbow Trout | 240 | 9.9 in avg |
| June 27, 2023 | Tiger Trout | 605 | 10.75 in avg |
| April 19, 2023 | Brown Trout | 3,212 | 2.62 in avg |
| April 19, 2023 | Rainbow Trout | 264 | 9.9 in avg |
| July 12, 2022 | Rainbow Trout | 306 | 10.29 in avg |
| June 15, 2022 | Tiger Trout | 512 | 8.74 in avg |
| June 8, 2022 | Rainbow Trout | 252 | 10.97 in avg |
| April 19, 2022 | Brown Trout | 3,090 | 2.95 in avg |
| July 19, 2021 | Rainbow Trout | 1,650 | 10.24 in avg |
| May 11, 2021 | Brown Trout | 3,620 | 4.17 in avg |
| May 11, 2021 | Rainbow Trout | 252 | 10.5 in avg |
| July 7, 2020 | Rainbow Trout | 542 | 10.06 in avg |
| July 7, 2020 | Rainbow Trout | 783 | 10.06 in avg |
| May 26, 2020 | Rainbow Trout | 671 | 10.54 in avg |
| May 26, 2020 | Rainbow Trout | 724 | 10.54 in avg |
| April 20, 2020 | Brown Trout | 3,074 | 3.25 in avg |
| July 17, 2019 | Rainbow Trout | 600 | 10.13 in avg |
| July 17, 2019 | Rainbow Trout | 744 | 10.13 in avg |
| June 13, 2019 | Rainbow Trout | 600 | 9.99 in avg |
| June 13, 2019 | Rainbow Trout | 750 | 9.99 in avg |
| June 3, 2019 | Brown Trout | 3,951 | 3.91 in avg |
| July 10, 2018 | Rainbow Trout | 607 | 8.68 in avg |
| July 10, 2018 | Rainbow Trout | 750 | 8.68 in avg |
| June 19, 2018 | Brown Trout | 3,984 | 4.3 in avg |
| May 31, 2018 | Rainbow Trout | 597 | 10.02 in avg |
| May 31, 2018 | Rainbow Trout | 749 | 10.02 in avg |
| June 7, 2017 | Brown Trout | 3,064 | 3.62 in avg |
| July 20, 2016 | Rainbow Trout | 364 | 10.44 in avg |
| July 20, 2016 | Rainbow Trout | 667 | 10.44 in avg |
| June 27, 2016 | Rainbow Trout | 833 | 9.88 in avg |
| June 9, 2016 | Brown Trout | 2,992 | 4.83 in avg |
| August 10, 2015 | Rainbow Trout | 300 | 9.54 in avg |
| August 10, 2015 | Rainbow Trout | 360 | 9.54 in avg |
| July 7, 2015 | Rainbow Trout | 299 | 9.25 in avg |
| July 7, 2015 | Rainbow Trout | 375 | 9.25 in avg |
| June 23, 2015 | Rainbow Trout | 305 | 9.64 in avg |
| June 23, 2015 | Rainbow Trout | 377 | 9.64 in avg |
| May 11, 2015 | Rainbow Trout | 335 | 8.12 in avg |
| May 11, 2015 | Rainbow Trout | 407 | 8.12 in avg |
| April 29, 2015 | Brown Trout | 3,084 | 4.17 in avg |
| August 11, 2014 | Rainbow Trout | 316 | 9.38 in avg |
| August 11, 2014 | Rainbow Trout | 395 | 9.38 in avg |
| July 7, 2014 | Rainbow Trout | 311 | 8.73 in avg |
| July 7, 2014 | Rainbow Trout | 376 | 8.73 in avg |
| June 11, 2014 | Rainbow Trout | 299 | 8.21 in avg |
| June 11, 2014 | Rainbow Trout | 373 | 8.21 in avg |
| May 13, 2014 | Rainbow Trout | 300 | 8.34 in avg |
| May 13, 2014 | Rainbow Trout | 375 | 8.34 in avg |
| April 24, 2014 | Brown Trout | 3,045 | 3.93 in avg |
| September 18, 2013 | Cutthroat Trout | 2,094 | 2.31 in avg |
| August 6, 2013 | Rainbow Trout | 271 | 9.77 in avg |
| August 6, 2013 | Rainbow Trout | 342 | 9.77 in avg |
| July 29, 2013 | Brook Trout | 1,386 | 2.74 in avg |
| July 8, 2013 | Rainbow Trout | 285 | 9.31 in avg |
| July 8, 2013 | Rainbow Trout | 354 | 9.31 in avg |
| June 4, 2013 | Rainbow Trout | 301 | 8.26 in avg |
| June 4, 2013 | Rainbow Trout | 375 | 8.26 in avg |
| May 20, 2013 | Brown Trout | 3,073 | 3.22 in avg |
| May 14, 2013 | Rainbow Trout | 299 | 8.09 in avg |
| May 14, 2013 | Rainbow Trout | 374 | 8.09 in avg |
| April 30, 2013 | Rainbow Trout | 585 | 10.23 in avg |
| September 13, 2012 | Cutthroat Trout | 2,170 | 2.36 in avg |
| August 8, 2012 | Rainbow Trout | 300 | 11.13 in avg |
| July 19, 2012 | Brook Trout | 1,022 | 2.8 in avg |
| July 19, 2012 | Rainbow Trout | 627 | 10.3 in avg |
| July 17, 2012 | Rainbow Trout | 560 | 10.46 in avg |
| July 16, 2012 | Rainbow Trout | 501 | 10.56 in avg |
| June 26, 2012 | Rainbow Trout | 499 | 10.99 in avg |
| June 12, 2012 | Brown Trout | 3,395 | 3.72 in avg |
| June 11, 2012 | Rainbow Trout | 484 | 9.81 in avg |
| September 14, 2011 | Cutthroat Trout | 1,965 | 1.63 in avg |
| August 9, 2011 | Rainbow Trout | 182 | 10.98 in avg |
| July 19, 2011 | Brown Trout | 3,185 | 4.67 in avg |
| July 19, 2011 | Rainbow Trout | 499 | 10.79 in avg |
| July 19, 2011 | Rainbow Trout | 576 | 10.79 in avg |
| June 28, 2011 | Brook Trout | 1,001 | 2.71 in avg |
| June 28, 2011 | Rainbow Trout | 503 | 10.96 in avg |
| June 28, 2011 | Rainbow Trout | 595 | 10.96 in avg |
| September 21, 2010 | Cutthroat Trout | 2,076 | 2.02 in avg |
| July 20, 2010 | Rainbow Trout | 366 | 9.27 in avg |
| July 14, 2010 | Rainbow Trout | 526 | 9.61 in avg |
| July 8, 2010 | Rainbow Trout | 491 | 9.67 in avg |
| July 6, 2010 | Brown Trout | 3,104 | 4.4 in avg |
| June 30, 2010 | Rainbow Trout | 554 | 9.45 in avg |
| June 28, 2010 | Rainbow Trout | 224 | 9 in avg |
| June 28, 2010 | Rainbow Trout | 410 | 10.08 in avg |
| June 8, 2010 | Brook Trout | 1,049 | 2.78 in avg |
| June 8, 2010 | Rainbow Trout | 473 | 9.53 in avg |
| July 23, 2009 | Rainbow Trout | 468 | 10.92 in avg |
| July 7, 2009 | Rainbow Trout | 482 | 10.39 in avg |
| July 2, 2009 | Rainbow Trout | 470 | 10.48 in avg |
| June 22, 2009 | Rainbow Trout | 486 | 10.37 in avg |
| June 15, 2009 | Brown Trout | 3,017 | 4.21 in avg |
| June 9, 2009 | Brook Trout | 1,082 | 3.03 in avg |
| June 9, 2009 | Rainbow Trout | 1,238 | 10.63 in avg |
| June 9, 2009 | Rainbow Trout | 506 | 10.63 in avg |
| October 21, 2008 | Cutthroat Trout | 2,091 | 2.85 in avg |
| July 23, 2008 | Rainbow Trout | 424 | 9.74 in avg |
| July 23, 2008 | Rainbow Trout | 464 | 9.74 in avg |
| July 3, 2008 | Rainbow Trout | 502 | 9.91 in avg |
| July 1, 2008 | Rainbow Trout | 482 | 10.05 in avg |
| June 23, 2008 | Brook Trout | 1,062 | 3.33 in avg |
| June 23, 2008 | Brown Trout | 2,720 | 5.03 in avg |
| June 11, 2008 | Rainbow Trout | 434 | 9.58 in avg |
| June 3, 2008 | Rainbow Trout | 494 | 9.89 in avg |
| September 7, 2007 | Rainbow Trout | 546 | 9.19 in avg |
| July 20, 2007 | Rainbow Trout | 340 | 9.35 in avg |
| July 17, 2007 | Rainbow Trout | 467 | 9.68 in avg |
| July 3, 2007 | Rainbow Trout | 336 | 9.65 in avg |
| June 29, 2007 | Brook Trout | 1,017 | 4.45 in avg |
| June 26, 2007 | Rainbow Trout | 428 | 9.47 in avg |
| June 22, 2007 | Rainbow Trout | 302 | 9.29 in avg |
| June 12, 2007 | Brown Trout | 2,997 | 4.73 in avg |
| June 5, 2007 | Rainbow Trout | 416 | 9.29 in avg |
| August 10, 2006 | Brook Trout | 998 | 3.22 in avg |
| June 22, 2006 | Brown Trout | 3,002 | 5.03 in avg |
| June 19, 2006 | Rainbow Trout | 795 | 9.81 in avg |
| August 24, 2005 | Rainbow Trout | 383 | 10.91 in avg |
| August 10, 2005 | Brook Trout | 1,003 | 3.09 in avg |
| July 21, 2005 | Brown Trout | 3,004 | 5.39 in avg |
| July 21, 2005 | Rainbow Trout | 398 | 9.96 in avg |
| August 4, 2004 | Rainbow Trout | 868 | 10.9 in avg |
| July 22, 2004 | Brook Trout | 245 | 2.45 in avg |
| June 30, 2004 | Rainbow Trout | 558 | 9.47 in avg |
| April 28, 2004 | Brown Trout | 2,994 | 3.56 in avg |
| July 30, 2003 | Brook Trout | 1,000 | 2.92 in avg |
| July 22, 2003 | Rainbow Trout | 490 | 10.71 in avg |
| June 20, 2003 | Brown Trout | 3,004 | 3.14 in avg |
| June 12, 2003 | Rainbow Trout | 508 | 9.11 in avg |
| July 29, 2002 | Brook Trout | 1,000 | 2.94 in avg |
| May 22, 2002 | Rainbow Trout | 510 | 8.99 in avg |
| May 14, 2002 | Brown Trout | 3,000 | 3.3 in avg |
Records shown exactly as published by Utah Division of Wildlife Resources. An event missing here does not mean the water was not stocked - some plants go unreported or are published elsewhere.
Data source: Utah Division of Wildlife Resources. Last updated: .
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