| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 41058 |
13 Aug 2025 @ 1541 |
--- |
Dan A |
Grizzly sow and cub see at firehole lake drive |
| 41036 |
13 Aug 2025 @ 0024 |
--- |
EmilyW |
Convective storm with plenty of deep rumbling from (likely positive) lightning and very minor sprinkles passed through the Old Faithful area. |
| 40983 |
11 Aug 2025 @ 1141 |
--- |
MAB |
drone over Porcelain Basin |
| 40984 |
11 Aug 2025 @ 1141 |
--- |
MAB |
drone over Porcelain Basin |
| 40958 |
10 Aug 2025 @ 1800 |
--- |
Darcie |
Grizzly and her cub less than 20’ off the road on the way in at Firehole Lake Drive. |
| 40957 |
10 Aug 2025 @ 1517 |
--- |
mwolf |
Semi centennial geyser and obsidian creek up and downstream are extremely green. Thick, opaque, green |
| 40904 |
08 Aug 2025 @ 1055 |
--- |
EmilyW |
Boardwalk between oblong and grotto is now open again. |
| 40787 |
03 Aug 2025 @ 1000 |
--- |
JSJ |
Chipmunk was chirping and begging at my feet on the White Dome boardwalk. I politely declined. It departed by squeezing through a gap between the walkway boards. |
| 40763 |
02 Aug 2025 @ 2347 |
--- |
JarnoO |
Shockwaves from an M6.8 aftershock southeast of Tuesday's M8.8 passed through the Yellowstone seismic network. |
| 40724 |
01 Aug 2025 @ 1305 |
--- |
mhreed |
Muskrat near the Firehole River bridge closest to Old Faithful |
| 40709 |
31 Jul 2025 @ 1615 |
--- |
K.Cooper |
boardwalk between Grand and Grotto open |
| 40693 |
29 Jul 2025 @ 1734 |
--- |
JarnoO |
Shockwaves from an M8.8 ESE of Petropavlovsk-Kamchatsky (Kamchatka Peninsula) began passing through Yellowstone's seismic network. Additionally, those of the M6.9 and M6.3 aftershocks passed through beginning 1819 and 1825, respectively. This is just SSW of the M7.4 earthquake (now evidently a foreshock) on July 20. |
| 40692 |
29 Jul 2025 @ 1200 |
--- |
RVD |
Boardwalk closed midweek at Oblong, between Grand and Giant, opening by the weekend. |
| 40611 |
26 Jul 2025 @ 0805 |
--- |
Polly |
3 moose near Fairy Falls parking area. 🥰 Looked like a bull, a cow, & what I think was a 2 year old bull hangin’ out with mom. |
| 40601 |
25 Jul 2025 @ 1050 |
--- |
aferrara |
Old well site in the West Thumb parking lot bursting 3-4' from pool, with separate jets of mud coming up from what appears to be an old pipe. Ongoing when I left. |
| 40566 |
23 Jul 2025 @ 0930 |
--- |
Mikemcc |
visitor report of two people with a dog that approached morning geyser from behind at around 08:00 |
| 40497 |
20 Jul 2025 @ 0058 |
--- |
JarnoO |
Shockwaves from an M7.4 foreshock east of Petropavlovsk-Kamchatsky (Kamchatka Peninsula) passed through the Yellowstone seismic network beginning this minute. Also shockwaves from the M6.6 foreshock at 0037; and M6.7 and M6.6 aftershocks (of the M7.4) at 0117 and 0132, respectively.
Updated 2025-07-29: Initially this note implied that the M7.4 quake was the mainshock, however, today an M8.0 occurred at 2324:50 UTC, effectively "downgrading" the M7.4 to a foreshock. |
| 40499 |
19 Jul 2025 @ 0803 |
--- |
MAB |
This past week since my visit on 13th crews began asphalt removal below Intersection Springs below the area that has been barricaded closed |
| 40435 |
16 Jul 2025 @ 1444 |
--- |
JarnoO |
Shockwaves from the M7.3 earthquake south of the southern tip of Nagai Island (Alaska) passed through Yellowstone beginning this minute. |
| 40369 |
13 Jul 2025 @ 1220 |
--- |
MAB |
NGB: Nuphar Lake lots of floating algae (?) growth along edges and tons in far east end - probably result of 3+ years of thermal waters from Porcelain Terrace? Will see if it clears up in time. High water marks and downed trees along the shore are amazing |
| 40368 |
13 Jul 2025 @ 1210 |
--- |
MAB |
NGB: Nuphar Lake trail cleared - campground trail is open - 1st time since 2022 |
| 40262 |
06 Jul 2025 @ 1427 |
--- |
MAB |
NGB East Fork Tantalus slightly muddy at bridge- could be from rains but thought I should note it EDIT - see Tantalus Geyser Note - muddy boils and bubbles center pool and it is also receiving waters from an overflowing Root Pool |
| 40254 |
06 Jul 2025 @ 1120 |
--- |
MAB |
baby Robins hatched in nest by Hurricane Vent |
| 40137 |
28 Jun 2025 @ 1957 |
--- |
MAB |
drove thru a dandy hailstorm north of Indian Creek with the road covered in the Wylie Swan Lake Camp area |
| 40149 |
28 Jun 2025 @ 1907 |
--- |
MAB |
Bog Orchids blooming between Echinus and Steerage |
| 39993 |
21 Jun 2025 @ 0830 |
--- |
Pholli |
Dead bison in Grand Prismatic Spring on boardwalk side.
Visitor report of 2 bison falling into grand prismatic spring today around 0730. I could only get photos and verify that one bison in fact perished. The other one possibly sunk. I didn't bring my soup ladle with me in my rove pack |
| 39931 |
18 Jun 2025 @ 1747 |
--- |
steve |
Several of the trees that used to block the view from the Fountain overlook have been removed. The view is much better. |
| 39933 |
18 Jun 2025 @ 1747 |
--- |
steve |
Several of the trees that used to block the view from the Fountain overlook have been removed. The view is much better. |
| 39922 |
18 Jun 2025 @ 1527 |
--- |
Polly |
The aforementioned barricade at Grotto was taken down by the workmen and the boardwalk is open again to Giant. |
| 39920 |
18 Jun 2025 @ 1327 |
--- |
Polly |
Sometime in the last couple of days they have put up a new large barricade on the boardwalk at Grotto. Previously it was ok to walk to Giant (the closure started past the Giant cage), but the path is closed now. |
| 39873 |
14 Jun 2025 @ 1445 |
--- |
mdschwarz |
Boardwalk closed between Oblong and Grotto |
| 39799 |
11 Jun 2025 @ 1030 |
11 Jun 2025 @ 1215 |
mdschwarz |
Westbound lane of Seven Mile Bridge closed for road work with concrete barriers. 90 minute delay going from West Yellowstone to Madison.
Eastbound traffic backed up to Montana state line.
Does not look like something that will be completed quickly. |
| 39795 |
11 Jun 2025 @ 0820 |
11 Jun 2025 @ 0840 |
Polly |
Bison herd (cows & calves) being stalked by lone wolf during my Very Slow drive across Fountain Flats. |
| 39616 |
01 Jun 2025 @ 0243 |
--- |
Betty |
Starlink satelites visible on webcam, seen on GOSA overnight capture |
| 39597 |
01 Jun 2025 @ 0116 |
--- |
JarnoO |
(wc) Northern lights visible as green band |
| 39451 |
28 May 2025 @ 2248 |
28 May 2025 @ 2301 |
Ben VL |
Weak aurora visible in ugb. Not visibly saturated, small pillars, no waves. |
| 39450 |
28 May 2025 @ 2145 |
--- |
Art |
Geomagnetic Kp index of 7. Keep an eye out for chance of auroras. |
| 39380 |
26 May 2025 @ 1450 |
--- |
steve |
Lower Hamm will open for summer on 5-30-25 at 1300. |
| 39368 |
26 May 2025 @ 0900 |
--- |
JarnoO |
YVO has a webcam in Biscuit Basin to monitor Black Diamond. It was placed on May 14, has been online since May 22 and announced to the public in this week's Caldera Chronicles. The frame updates every 15 minutes (no livestream at this time due to bandwidth constraints), but video is recorded locally and can be saved if changes are detected. The intention is that it remains in place throughout this summer, but can be hardened to last through winter. |
| 39268 |
22 May 2025 @ 1930 |
--- |
BrandonC |
Sow and coy on bike path at castle |
| 39264 |
22 May 2025 @ 1210 |
--- |
LynnS |
Mama bear (probably a griz) and COY ran across Labial to Shelf Spring mound and across road in toward Old Bath Lake |
| 39156 |
18 May 2025 @ 0745 |
--- |
LynnS |
Two bears on hillside west of Firehole River at south end of the meadow by Steel Bridge attracting attention |
| 39109 |
17 May 2025 @ 0715 |
--- |
Mikemcc |
two grizzlies on the hill directly across from mallard lake trailhead |
| 39091 |
16 May 2025 @ 1425 |
--- |
Tara |
bear jam just south of Mallard Creek TH, 2 dark colored adult grizzlies |
| 39053 |
14 May 2025 @ 1600 |
--- |
Graham |
Fountain: Vista enhancement? Several trees in front of the bench have been cut down. There's now a large open view. |
| 38980 |
10 May 2025 @ 1000 |
--- |
Janet Jones |
Significant snow melt over the past week. Ice out is not far off on the lake. |
| 38903 |
09 May 2025 @ 1040 |
--- |
SantaFe108 |
Illegal drone flying around geyser hill at this time. |
| 38904 |
09 May 2025 @ 0836 |
--- |
steve |
Two cranes at the entrance for the firehole loop. |
| 38876 |
08 May 2025 @ 0000 |
--- |
Graham |
The service road between the Lower Store and the Snow Lodge has been closed since opening day due to work on the dorm. The Lower Store parking lot can be full in the morning with Inn guest vehicles. This will be worse when the Lower Store staff arrive for their opening the Friday after Memorial Day. |
| 38816 |
03 May 2025 @ 2133 |
--- |
K.Cooper |
INCREDIBLE meteor lit up the entire back basin before exploding. Loud sonic boom rumble followed a minute later, enough to shake trees |
| 38809 |
03 May 2025 @ 2132 |
--- |
aferrara |
Boom? Earthquake? heard/ felt in both Grant and Old Faithful near simultaneously |
| 38785 |
03 May 2025 @ 1240 |
--- |
MAB |
from Constant bench steam behind the berm in N Porc beautifully prismatic! |
| 38553 |
20 Apr 2025 @ 0915 |
20 Apr 2025 @ 1445 |
DanS |
Gates on Firehole Lake Drive closed but no bear management closure. Road has not been plowed but is passable from entrance. Substantial snow blockage from Fountain exit gate. Road conditions decent.
Fountain Flat road also open. |
| 38381 |
28 Mar 2025 @ 1703 |
28 Mar 2025 @ 1758 |
DanS |
Wolves near Castle.
Also seen in same area this morning. |
| 38379 |
28 Mar 2025 @ 0035 |
--- |
JarnoO |
Shockwaves from the M7.7 earthquake in Myanmar/Burma began passing through Yellowstone, especially noticeable from 0040 to 0258. |
| 38340 |
01 Mar 2025 @ 0856 |
--- |
ghost842 |
Wapiti Pack at biscuit basin |
| 38293 |
23 Feb 2025 @ 1400 |
23 Feb 2025 @ 1600 |
K.Cooper |
Entire hillside by ledge thumping every few minutes with a audible constant rumbling/shaking |
| 38243 |
08 Feb 2025 @ 1630 |
--- |
JSJ |
Shock waves from a magnitude 7.6 earthquake along the Swan Islands Transform Fault in the western Caribbean Sea arrived at Yellowstone's seismic network. |
| 38237 |
05 Feb 2025 @ 0818 |
--- |
ghost842 |
Wolves at biscuit basin heading towards Artemesia |
| 38195 |
14 Jan 2025 @ 1439 |
--- |
aferrara |
Coyote on geyser hill near Sponge |
| 37970 |
05 Dec 2024 @ 1147 |
--- |
JarnoO |
Shockwaves from an M7.0 at the southern end of the Cascadia Basin (near the triple junction) began passing through Yellowstone at this time. |
| 37946 |
19 Nov 2024 @ 1530 |
--- |
rwd03 |
Fox on webcam! |
| 37910 |
03 Nov 2024 @ 0200 |
--- |
JarnoO |
MDT -> MST; OFVEC static switched to MST at 1259 MDT |
| 37822 |
29 Oct 2024 @ 1215 |
--- |
MAB |
flock of noisy ducks took off from Nuphar Lake |
| 37791 |
27 Oct 2024 @ 1149 |
--- |
MAB |
2 fighter jets buzzed the basin from south to NE |
| 37536 |
12 Oct 2024 @ 1840 |
--- |
Betty |
Wolves or Coyotes heard howling in Norris back basin |
| 37502 |
10 Oct 2024 @ 1300 |
--- |
SantaFe108 |
NGB: Boardwalk still closed between Basin and the junction above Guardian. |
| 37467 |
10 Oct 2024 @ 0600 |
--- |
JarnoO |
The SWPC forecasts an aurora visible tonight from "maybe as far south as Alabama to northern California", in association with a fast coronal mass ejection in the evening of October 8. |
| 37452 |
08 Oct 2024 @ 2315 |
--- |
Ben VL |
Faint aurora visible in UGB. Small pillars for a couple mins. |
| 37442 |
08 Oct 2024 @ 1251 |
--- |
JarnoO |
(wc) Couple with a (tame) golden parakeet or sun conure (former seems more likely) off the trail on the path towards the Beehive viewing platform across the river. Parrot had been placed in the dead tree located where the boardwalk starts, after which pictures/videos were taken of it. On trail again 1253. |
| 37438 |
07 Oct 2024 @ 2015 |
--- |
Ben VL |
Aurora visible on the horizon in the UGB. A bit better than last night. ~2020 about 5-10 mins of nice activity. Tall pillars and saturated reds. No waves |
| 37454 |
07 Oct 2024 @ 0054 |
--- |
JarnoO |
Shockwaves from an M4.1 east of Dillon (MT) passed through Yellowstone beginning this minute. Even showed up on normally insensitive seismographs, such as YNM and YNB. |
| 37424 |
06 Oct 2024 @ 2045 |
--- |
Ben VL |
Extremely weak Aurora visible in UGB. |
| 37400 |
04 Oct 2024 @ 1715 |
--- |
cb |
path in front of Ledge is closed from the intersection coming up from Crackling Lake to the Basin Geyser intersection. Must take new bw past Congress now. |
| 37254 |
29 Sep 2024 @ 1004 |
--- |
TSBryan |
had been told of muddy springs and possible disturbance but today minimal murkyness in all Back Basin springs. However Tantalus Creek distinctly muddy at bridge near Vixen; later was told "we've been seeing that." |
| 37211 |
28 Sep 2024 @ 1505 |
--- |
ddshepard |
Two men walked to edge of Brilliant Pool (in front of Comet). I yelled at them and they left. |
| 37208 |
28 Sep 2024 @ 0945 |
--- |
Graham |
New boardwalk from Porcelain Basin overlook by the Museum to Congress Pool provides nice wheelchair access to the existing boardwalk down to Porcelain Basin. The old gravel trail was hard going. |
| 37196 |
27 Sep 2024 @ 1930 |
--- |
Graham |
Many wolf watchers out at Biscuit Basin again. |
| 37190 |
27 Sep 2024 @ 1110 |
--- |
Tara |
Trail to geyser Hill currently open, bison is well Upstream of bridge |
| 37187 |
27 Sep 2024 @ 0917 |
--- |
ddshepard |
Grey wolf just south of Biacuit Basin. Appears to be eating a carcass. Lots of cars stopped.
- Still there as of 16:10 |
| 37180 |
26 Sep 2024 @ 1845 |
--- |
PMGuernsey |
Pack of 4 wolves just south of biscuit basin. Large black one in the river. |
| 37172 |
26 Sep 2024 @ 0949 |
--- |
Graham |
Black wolf at Biscuit Basin |
| 37013 |
16 Sep 2024 @ 1219 |
--- |
Ben VL |
Two tour busses parked in the hams lot, the two combined blocking over a third of the available spots. |
| 36996 |
15 Sep 2024 @ 1629 |
--- |
JarnoO |
Shockwaves of an M6.5 at Queen Charlotte Sound passed through Yellowstone beginning this minute. |
| 36991 |
15 Sep 2024 @ 1313 |
--- |
Tara |
Grizzly bear strolling past Black Diamond on the broken boardwalk, casually ignoring closure signs |
| 36975 |
14 Sep 2024 @ 1410 |
--- |
Pholli |
boardwalk repairs from grotto to giant completed. no longer any closure |
| 36864 |
09 Sep 2024 @ 1010 |
--- |
CP |
The boardwalk from Grotto to Oblong is open. |
| 36815 |
06 Sep 2024 @ 1825 |
--- |
Dave W |
Firehole Lake Drive is now closed until 2nd wooden bridge (which has a 1 1/2 to 2 foot hole in it) can be repaired. Ranger stated road will be closed for about 2 weeks. |
| 36751 |
04 Sep 2024 @ 1649 |
--- |
LynnS |
There’s a small fire next to the west entrance road. The road is open but some pullouts and Riverside Are closed. |
| 36743 |
04 Sep 2024 @ 1234 |
--- |
Ben VL |
2x car alarm dool in the parking lot somewhere |
| 36754 |
04 Sep 2024 @ 1200 |
--- |
steve |
The boardwalk from the bridge to grotto geyser will be replaced over the next two weeks. |
| 36733 |
04 Sep 2024 @ 0700 |
--- |
SteveO |
Backhoe with forks hauling bunks of lumber down basin on the asphalt path. |
| 36628 |
30 Aug 2024 @ 1353 |
--- |
Scott H |
NPS is closing Madison-West from 1430 to 1525 for emergency road repair. |
| 36522 |
23 Aug 2024 @ 1758 |
--- |
Kyle |
Traffic accident on loop road, southbound lane. 0.8 miles north of OF exit. 0.7 miles south of Daisy Trail turnout
large RV vs small sedan. traffic control and ambulance on the scene |
| 36336 |
09 Aug 2024 @ 1600 |
--- |
JarnoO |
(wc) Conewalkers (one in white, one in black) at Three Sisters, on the Little Brother and Three Crater side of the pool. The person in white walked on the edge of the pool at Little Brother and again at Three Crater; they're lucky the former erupted only seconds after they had passed. Reached the road mid-1601. |
| 36266 |
04 Aug 2024 @ 1222 |
--- |
minissa |
Tourists with a child walking around on sinter at 3 Sisters. North pool is still not quite refilled |
| 36183 |
30 Jul 2024 @ 2010 |
30 Jul 2024 @ 2020 |
EmilyW |
3 powerful, close and, positive lightning strikes that shook the cabins during this time. |
| 36058 |
23 Jul 2024 @ 1209 |
23 Jul 2024 @ 1212 |
JarnoO |
(wc) Helicopter flew a couple of rounds somewhere downbasin in line of Artemisia. Given recent events (read: Black Diamond eruption) it was likely a short survey of its immediate surroundings. |
| 36053 |
23 Jul 2024 @ 1103 |
--- |
aferrara |
biscuit to be closed for immediate future |
| 35837 |
11 Jul 2024 @ 0912 |
--- |
JarnoO |
M6.4 (1508:47 UTC/0908:47 MDT) at the Cascadia Basin west of Vancouver Island, on the Juan de Fuca Ridge halfway between Seminole and Springfield seamounts. A couple show the P waves passing through beginning 0912 (including YMC, YNR, YLT, YHL, YMV), with S waves showing up well starting 0915 on all seismographs (even the normally insensitive ones like YNB, YMR; perhaps with exception to YNM). |