Blue Mud Steam Vent Geyser

Last Known Eruption
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Latest Eruptions

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Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
38949 10 May 2025 @ 1625 --- MAB a little lower still violent non stop boils of dark gray water - humorous plugs from side vents
38796 03 May 2025 @ 1646 --- MAB water level dropped several inches maybe even a foot - still ugly dark mud colored in non stop boils - loud slurps slaps and glugs heard from side vents
38665 27 Apr 2025 @ 1749 --- MAB more of a brown color than last visit- nearly full busy boils
38559 21 Apr 2025 @ 1103 --- Graham Boiling about 2 feet below the rim.
38527 19 Apr 2025 @ 1616 --- MAB nearly full dark gray water w steady boils - side vent gurgling noisily but no spritzes seen
37887 31 Oct 2024 @ 1637 --- SantaFe108 LOW! ~8ft below rim and bursting with gray muddy water. High water in the Muddy Sneaker Complex, NBK-4 "Arrow" has gray mud coating vent and platform.
37832 29 Oct 2024 @ 1641 --- MAB essentially same as Sunday
37793 27 Oct 2024 @ 1329 --- MAB low - only tips of splashes visible - Arrow NBK-4 not receiving flow but saw dirty splashes above the rim - no steam at 2nd pool of Hydrophane guess is water dropped
37733 24 Oct 2024 @ 1606 --- SantaFe108 LOW! 4 feet below rim and angrily churning mud with occasional burp from the side vents. Muddy Sneaker Complex is high, NBK-4 "Arrow" calmly steaming with mud coating vent and surroundings.
37649 19 Oct 2024 @ 1603 --- MAB dark gray real watery consistency with some flowing down into Arrow Spearpoint NBK4
37484 10 Oct 2024 @ 1026 --- SantaFe108 Very high, all vents inundated and boiling thru gray muddy water. Water level is high enough to seep overflow out the back of both "ears". Muddy Sneaker Complex high, multiple pools with standing water. NBK-4 steaming with gray mud coating the inside of vent and platform.
37371 03 Oct 2024 @ 1516 --- SantaFe108 HIGH! All 3 vents underwater, barely seeping blue muddy overflow from both "ears". Muddy Sneaker Complex is high, multiple pools with standing water. NBK-4 "Arrow" gently steaming with blue mud coating inside of vent and surrounding platform.
37248 29 Sep 2024 @ 0932 --- TSBryan bubbling from several places but barely any runoff which looked sort of oily
37206 28 Sep 2024 @ 0857 --- Graham In overflow with small steady boil.
36585 27 Aug 2024 @ 1906 --- cb pool is HIGH. Just a few inches below its 2 side vents. water is dark chocolate brown and it's middle vent has a vigorous blooping boil. both side vents are also blooping to 4-6"
36447 18 Aug 2024 @ 1242 --- Craigmon99 Still watery. Two vents bubbling
35422 21 Jun 2024 @ 1523 --- nails Dark grey and watery. About 6 inches below level of side vents.
35337 19 Jun 2024 @ 1047 --- Craigmon99 Watery. Faintly translucent on the edges.
35338 19 Jun 2024 @ 1047 --- Craigmon99 Watery. Faintly translucent on the edges.
35148 12 Jun 2024 @ 1303 --- CrisG still quite full. 2 side vents barely connected with water to main pool.
35095 10 Jun 2024 @ 1302 --- SantaFe108 HIGH! 2 inches below overflow, covering all 3 vents. Lazy center and left vent boil, with grey muddy water. Muddy Sneaker Complex has high water, several pools including Arrow have visible water.
34969 07 Jun 2024 @ 1323 --- CrisG thin blue grey mud. continuous boil about 1.5 ft from full. light bubbling in side vents
34702 26 May 2024 @ 0827 --- ypcaribou Muddy gray thin condistency. Looking like Baby Yoda with its side vents
34255 19 Apr 2024 @ 1520 --- MAB very dark churning visible water within 1.5ft of max fill - side vents noisily and humorously gurgling but no spritzes seen
29320 31 Oct 2023 @ 1626 --- MAB quite violent not visible water - Arrow had steam that other pointy pool in Tangled Root had zero steam
29026 22 Oct 2023 @ 0904 --- SantaFe108 Furiously churning mud about ~5 feet below the rim. Left side vent is spitting a little mud with right side vent completely quiet. One of the Muddy Sneaker Complex pools behind and to the left has water in it. NBK-4 appears to have mud coating the inside of the vent but was only steaming when I passed.
28974 21 Oct 2023 @ 1535 --- JR So low you can’t see mud from the boardwalk looking in. Lots of gurgling and steam. Smells like smoked Pork Butt.
28922 20 Oct 2023 @ 1556 --- MAB Low - vent was in the shade couldn't see water level but it dropped significantly since my last view. NBK4 steaming
28892 19 Oct 2023 @ 1833 --- ypcaribou Muddy water barely visible in main vent but dplashing vig. right side wall appears to connect to right satellite hole!
28878 19 Oct 2023 @ 1159 --- DanS Boiling and splashing
28767 14 Oct 2023 @ 1322 --- SantaFe108 Churning mud in center vent, Side vents coated in mud and burping. NBK-4 "Arrow" lightly steaming.
28577 30 Sep 2023 @ 0822 --- ypcaribou Vent bowl including the ear holes is dark gray almost black. splashy mud in main vent is s lighter but still dark gray. Gurgling from ears
28506 26 Sep 2023 @ 1706 --- MAB Full violent churning dark dark mud - NBK4 {Arrow-Spearpoint} had visible steam but no water {or mud} visible - no water visible and very little steam from Hydrophane either
28010 04 Sep 2023 @ 1639 --- cb water level is high in all 3 vents splashing blue mud in a 1' circumstance of each side vent
27290 28 Jul 2023 @ 2025 --- SantaFe108 Angrily churning blue-grey mud. Both side vents coated in wet mud and loudly burping. NBK-4 "Arrow" steaming quietly
27175 23 Jul 2023 @ 1429 --- mhreed Moderate roiling. Grey.
26948 08 Jul 2023 @ 1938 --- nails Churning dark gray water. Vent to right is grumbling.
26409 17 Jun 2023 @ 1515 --- SantaFe108 Churning mud in the center, Both side vents covered in wet mud but doing dry gurgling.
26361 16 Jun 2023 @ 0933 --- CrisG center vent churning blue mud approx 2ft below edge of crater. side vents gurgling
26311 14 Jun 2023 @ 1157 --- CrisG nearly full (approx 3" below rim of bowl on left side difficult to measure with sloshing) of blue grey water with moderate boil. side vents bubbling
25863 28 May 2023 @ 1956 --- SantaFe108 Churning blue mud in center vent. Both vents on either side are dry making burping noises.
25466 15 May 2023 @ 1922 --- ypcaribou Dark gray splashymud water. Still getting the gutteral burps from both side holes
24596 30 Oct 2022 @ 1714 --- ypcaribou Full & splashing blue mud. The vents either side are still burping and now have blue mud lining them. Together, the 3 vents kinda resemble Baby Yoda
24406 15 Oct 2022 @ 0943 --- MAB visible dark gray muddy water not too thick - vigorously splashing - nothing visible in side vents but they were noisy! NBK4 steamy w no visible water
24252 05 Oct 2022 @ 1240 --- cb Pool in the main vent is high, about 6" down from the rim closest to the bw, vigorous roiling boil with characteristically blue mud. Side vents are gurgling but not mud seen.
24077 24 Sep 2022 @ 1554 --- CrisG churning boil of dark grey mud. side vents gurgling and popping.
24078 24 Sep 2022 @ 1554 --- CrisG churning boil of dark grey mud. side vents gurgling and popping.
23962 20 Sep 2022 @ 1656 --- ypcaribou Churning and splashing like a pot of noodles about to boil over. In slate gray mud! vent holes either side are making post root beer burping noises.
23637 07 Sep 2022 @ 1145 --- MAB foot below east rim violently boiling - steam seen a few times from Vixen presumed from Blue Mud
23501 31 Aug 2022 @ 1128 --- cb Vigorously churning and boiling to ~1'. Still throwing lihht blue mud. Side vent toward Green Dragon Springs has been cleared of sticks and debris, is gurgling but no visable water seen.
29099 21 Aug 2022 @ 1200 --- research-mab 8/21/2022 - no time noted - - Blue Mud Steam Vent is visible and bubbling loudly
23326 21 Aug 2022 @ 1045 --- ypcaribou Muddy medium gray water low in vent splashing vigorously!
23261 18 Aug 2022 @ 0937 --- MAB easily visible water level in a crazy but steady boil - approx a foot below lowest rim towards walk
29092 14 Aug 2022 @ 1200 --- research-mab 8/14/2022 - no time noted - Blue Mud Vent is half-full , 131.2°
23078 06 Aug 2022 @ 1133 --- cb I can see water! visable pool of vigorously boiling splashing water at the bottom of the vent. Sides still covered in blue mud
22985 02 Aug 2022 @ 1040 --- cb Water level below sight. tips of some splashes visable. Vent up to the rim is still coated in blue mud
22740 20 Jul 2022 @ 1851 20 Jul 2022 @ 1854 nails Noisy splashing. Some dark muddy splashes can be seen in the bottom of the feature but water level is too far down to see from boardwalk.
22320 04 Jul 2022 @ 1447 --- cb no more visable water. gurgling and splashes are VERY audible tho
29076 03 Jul 2022 @ 1200 --- research-mab - no time noted - 7/3/22 Blue Mud Steam Vent is so low, I could not see any activity. There was still sound deep down.
22198 29 Jun 2022 @ 0958 --- mwolf splashing barely visible
22090 23 Jun 2022 @ 1803 --- cb main pool about 6" below rim closest to the boardwalk with a vigorous boil. side vents gurgling but no visable mud spray
21609 31 May 2022 @ 1507 --- cb Vigorous blue mud roiling boil. Both side vents are clear of debris and active.
21331 16 May 2022 @ 1117 --- Tara Water level about 3' down with vigorous bursting, muddy blue water. looks like there's some kind of metal bar in it.
21014 18 Apr 2022 @ 1704 --- MAB visible boiling dark brown water a foot below high-mud mark - could hear growls in the side vent - Arrow NBK4 steamy w no visible water - nothing seen draining from the large NE Hydrophane either
20249 31 Oct 2021 @ 1014 --- MAB noisy subterranean splashing - none visible above ground
20052 19 Oct 2021 @ 1343 --- cb YAY! This has its own designation! Water no visible but VERY audible splashing. Mud is mostly white with a few areas that are returning to blue mud. Side vent on the left is steamy
20581 30 Sep 2021 @ 1247 --- research-mab 09/30/2021 CB 1247: BLUE MUD STEAM VENT has a audible boil very deep in the vent that has a Echo like sound to it. no visible water & the splash zone is white, not blue. the side vent towrd green dragon spring is white and just steamy - - https://geysertimes.org/note.php?id=19811
20580 23 Sep 2021 @ 1039 --- research-mab 09/23/2021 CB 1039: BLUE MUD STEAM VENT still has no visable water or splashes but has very audible gurgling deep down in the vent, also the left side vent is mostly clear of debris and is steaming - - https://geysertimes.org/note.php?id=19699
20579 16 Sep 2021 @ 1041 --- research-mab 09/16/2021 CB 1041: BLUE MUD STEAM VENT > no visible water but can hear churning deep in the vent. Side vent on the left end is clear of debris and is steaming - - https://geysertimes.org/note.php?id=19608
20578 01 Aug 2021 @ 1023 --- research-mab 08/01/2021 CB 1023: Blue Mud Steam Vent is still low, the side vent toward Orby is completely covered with debris. The other side vent is clear of debris and steaming. - - https://geysertimes.org/note.php?id=18782
20577 11 Jul 2021 @ 1453 --- research-mab 07/11/2021 CB 1453: BLUE MUD STEAM VENT has no visable water but I can hear splashing deep in the vent - - https://geysertimes.org/note.php?id=18369
20576 05 Jul 2021 @ 1502 --- research-mab 07/05/2021 CB 1502: Blue Mud Steam Vent still has no visable spray of water but I can hear water sloshing around deep in the vent - - https://geysertimes.org/note.php?id=18281
20575 29 Jun 2021 @ 1335 --- research-mab 06/29/2021 CB 1335: Blue mud steam vent still has no visable water but can hear splashing down deep - - https://geysertimes.org/note.php?id=18183
20574 08 Jun 2021 @ 1119 --- research-mab 06/08/2021 CB 1119: Blue mud spring vent water is churning deep DEEP Down in the vent. water not visable. side vents are inactive and dry - - https://geysertimes.org/note.php?id=17573
20573 30 May 2021 @ 1607 --- research-mab 05/30/2021 CB 1607: blue mud steam vent has water churning WAY down in the vent. occasionally I can see a wave of water but the water is not readily visable. Both side vents are steaming but inactive - - https://geysertimes.org/note.php?id=17276
20532 24 Jan 2021 @ 1408 --- research-mab 01/24/2021 markwolf 1408: blue mud steam vent is quite low - mud is tan - - https://geysertimes.org/note.php?id=16823
29169 14 Oct 2020 @ 1200 --- research-mab 10/14/2020 - no time noted - very high water levels throughout the Back Basin – I’m assuming at least partly due to recent snowfall Blue Mud Steam Vent – Yellow Funnel Spring – Crater Spring
20572 10 Oct 2020 @ 1028 --- research-mab 10/10/2020 1028 CB 1028: Blue Mud Steam Vent water level is up a few inches and both side vents are almost connected to the center or main vent. Main vent has a vigorous boil and both side vents are active - - https://geysertimes.org/note.php?id=16396
20571 06 Oct 2020 @ 1232 --- research-mab 10/06/2020 CB 1232: Blue mud steam vent pool has dropped ~8". The side vents are above the water/mud level and only the vent to the north is gurgling and occasionally throwing blue mud. The big center pool has a vigorous roiling boil. - - https://geysertimes.org/note.php?id=16343
20570 26 Sep 2020 @ 1615 --- research-mab 09/26/2020 CB 1615: Blue mud steam vent is VERY high and the main vent is overflowing into the 2 small vents on either side of it. All 3 pools have a blooping boil. - - https://geysertimes.org/note.php?id=16270
20569 29 Aug 2020 @ 1220 --- research-mab 08/29/2020 CB 1220: Blue Mud Steam Vent water/mud level is still very high and with a very active roiling boil. Both of its side vents are high and blurpping blue mud - -https://geysertimes.org/note.php?id=15894
20568 13 Aug 2020 @ 0813 --- research-mab 08/13/2020 CB 0813: Blue Mud Steam Vent pool is VERY high and vigorously boiling. about 3" below the nw side vent. A few vigorous boils and muddy water would slosh into the side vent. Both side vents are high and bubbling. - - https://geysertimes.org/note.php?id=15549
29165 06 Aug 2020 @ 1200 --- research-mab 8/6/2020 - no time noted -Blue Mud dropped again
29152 25 Jun 2020 @ 1230 --- research-mab 6/25/2020 - no time noted - Blue Mud SV is even more full!
29151 24 Jun 2020 @ 1200 --- research-mab 6/24/2020 - no time noted - Blue Mud Steam Vent has been very full
20480 20 Jul 2017 @ 1700 --- research-mab 7/20/2017 Fearless water level down 1650 Yellow Funnel + Blue Mud water level down @ 1700 - - NOTE to future researchers: This is the last Blue Mud SV entry found in logbooks up to the start of 2018 - the next log is in place at the museum and won't make it to the archives for a decade - entries will be sparse unless individuals enter from their personal logbooks or photos - after Oct. 2021 entries will pick up again after Blue Mud SV was added to GT - mab
20374 04 Oct 2016 @ 1200 --- research-mab 10/04/2016 Blue Mud Steam Vent’s water level is back up almost overflowing. [generic day time]
20375 29 Sep 2016 @ 1200 --- research-mab 9/29/2016 Blue Mud Steam Vent’s water level is so so low. You can see a stick caught in the feature that looks like it has been there for a long time. RP [generic day time]
20477 23 Sep 2016 @ 1200 --- research-mab 9/23/2016 Blue Mud Steam Vent water level is the highest I have seen it this summer. Almost to the rim. [generic day time]
29601 23 Sep 2016 @ 1200 --- research-mab 9/23/2016 - no time noted - Blue Mud Steam Vent water level is the highest I have seen it this summer. Almost to the rim.
20476 13 Sep 2016 @ 1200 --- research-mab 9/13/2016 Blue Mud Steam Vent is very full, at a high level actively bubbling almost overflowing its vent. [generic day time]
20475 07 Oct 2015 @ 1200 --- research-mab 10/7/2015 – Water/liquid back up for Mystic & Crater Yellow Funnel and Blue Mud still low. [generic day time]
20468 05 Oct 2015 @ 1200 --- research-mab 10/05/2015 Mystic, Green dragon, Crater & Yellow Funnel all MUCH lower liquid Blue Mud so low it sounds hollow as it bubbles deep. [generic day time]
20466 16 Sep 2015 @ 1200 --- research-mab 9/16/2015 The “muck erupter” {NBK6} I mentioned before is now bigger with somewhat clearer liquid. Blue Mud Steam Vent has a much higher liquid line than it did a few days ago. [generic day time]
20464 23 Aug 2015 @ 1030 --- research-mab 8/23/2015 Blue Mud Steam Vent so low you can’t see the water; Yellow Funnel Spring very active @ 1030am
20463 14 Jul 2015 @ 1200 --- research-mab 7/14/2015 -Blue Mud Steam Vent is very low [generic day time]
29551 14 Jul 2015 @ 1200 --- research-mab 7/14/2015 - no time noted - Blue Mud Steam Vent is very low
20462 19 Sep 2014 @ 1200 --- research-mab 9/19/2014 Blue mud steam vent has filled up. Perhaps this is b/c of the heavy rain we got last night. The small depressions to the north and south of the feature are full as well. [generic day time]
29543 19 Sep 2014 @ 1200 --- research-mab 9/19/2014 - no time noted - Blue mud steam vent has filled up. Perhaps this is b/c of the heavy rain we got last night. The small depressions to the north and south of the feature are full as well
20461 31 Aug 2014 @ 1200 --- research-mab 8/31/2014 Blue Mud Steam Vent – water is so high it’s almost overflowing the rim. [generic day time]
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