TOBACCO ROOT GEOLOGICAL SOCIETY 50th ANNUAL FIELD CONFERENCE
Bannack, Montana, JULY 24–28, 2025
View southwest overlooking the Bannack town center. Photo by Jesse Mosolf.
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Bannack Area Details, Conference Schedule, and Registration
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This year’s Annual Tobacco Root Geological Society Field Conference will be held in Bannack Montana. The conference check-in opens on late Thursday afternoon (July 24) with conference activities beginning Friday morning (July 25) and lasting through Sunday afternoon (July 27). There will be one additional post-meeting field trip on Monday.
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Details on the schedule and registration will be soon be available (mid June).​
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TENTATIVE SCHEDULE
General logistics chair: Jesse Mosolf (jmosolf@mtech.edu)
Editor of Northwest Geology and field guides: Colleen Elliott (celliott@mtech.edu)
Venue: Group site (pavilion) at Bannack State Park
On-site registration 4-6 pm, Thursday, July 24th.
Catering: UM-Western
Camping: Bannack campgrounds (reserved by TRGS), nearby Grasshopper Canyon, or surrounding public lands.
Lodging: Rooms and cabins are available in Dillon, Jackson Hot Springs, and Elkhorn Hot Springs, all within a 30-minute drive.
Scientific/educational presentations: evenings in Bannack’s historic church.
Tentative field trips (July 25-28):
Friday, July 25: half-day field trips
Geology of the upper Big Hole Valley basin
Geology of Bannack State Park
Bannack archeological tour and the Hendricks/Apex Mill
Badger Pass Cenozoic landscape history
Phosphoria at Dalys Spur
Bannack history tours
Saturday, July 26: full-day field trips
Tilted Tertiary beds, Mill Point near Bannack
Eocene volcanic rocks in Beaverhead Canyon
Fault, fold, and cleavage duplexes of Sandy Hollow
Glacial geology, Pioneer Mountains
Talc deposits in the Ruby Range
Bannack history tours
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Sunday, July 27: full-day field trips
Neogene Sixmile Creek Formation in the upper Ruby Valley
Geology of Birch Creek and the Indian Queen mine
Hell Roaring Creek Plutonic Metamorphic Complex
Late Cretaceous volcanogenic rocks and the Ermont Thrust
Virginia City geohazards and groundwater
Bannack history tours
Monday, July 28: post-meeting trip
Geology of the Nicholia Basin
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All field trip participants, including leaders, must register for the conference. Field trip leaders do not need to pay for the field trip(s) they are leading. Friday, Saturday, and Sunday field trip registration comes with lunch.
Please note that there are two places on the form where you can contribute to the scholarship fund of the TRGS – by purchasing a conference T-shirt or by making a direct contribution to scholarships.
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