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About this Calendar

The Western Interior Paleontological Society provides this free listing of earth science and nature events as a service to the public. To submit events for this online listing and our newsletter (published May through September), please send text to the

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Listings may be edited. Graphics may be included in the newsletter space permitting.



Western Interior Paleontological Society (WIPS) Meeting
First Mondays

WIPS meets the first Monday of the month from September to May (except for the December holiday auction which is held on a Saturday). Join us for great lectures and connect with fellow paleo enthusiasts. Check our home page for the current month's program.

Click WIPS Calendar of Events to see all upcoming WIPS programs, field trips and other events.

The PaleoZone – WIPS Club for Young Paleontologists

A youth program for family members of the Western Interior Paleontological Society. Suitable for children elementary school age and older. If your child or grandchild is interested in joining, please contact Dennis Gertenbach or 303-709-8218. Meets monthly, every third Sunday.


March 31-April 1 – Green River Rock & Mineral Festival

Opening lecture by Dr. Jim Kirkland, Utah State Paleontologist. John Wesley Powell River History Museum, Green River, Utah. Read more

March 31-April 2 – Fort Collins Rockhounds Gem & Mineral Show

Friday, 4-8 p.m.; Saturday, 9 a.m.-6 p.m.; and Sunday, 10 a.m.-5 p.m.) at The Ranch/Larimer County Fairgrounds in the Thomas M. McKee Building, Loveland, Colorado. Admission: $4/day adults or $7/three-day pass. Free parking. Read more


Through April 2 – Pterosaurs, Flight in the Age of Dinosaurs

Fort Collins Museum of Discovery. Read more

April 3 – A Tour of the Galeries D'Anatomie Comparée et de Paléontologie

A presentation by Steve Jorgensen at the April meeting of the Western Interior Paleontological Society

April 7 – Reef Communities from the Great Lakes of the Eocene

Mark Loewen (The University of Utah). Denver Museum of Nature & Science Colloquium. 3-4 p.m. in the Museum's VIP Room. No admission or reservations fee required. First-come, first-served

April 11 & 18, 15 & 22 – Rivers of the Front Range Through Time and Space

Explore the ancient and modern rivers of the Front Range. Ancient rivers deposited the bedrock aquifers that we rely on for drinking water in Douglas County. More recently, gold nuggets and flakes flowed from the veins of the mountains to the placer mines of the plains, and today floods continue to modify our landscape. Two field trips will present an opportunity to examine the ancient and modern rivers and their sediments, with a special focus on the pebbles and what they tell us about the geology of each river's headwaters. Read more

April 14-16 – Colorado Mineral & Fossil Spring Show

Rocky Mountain Gems & Minerals will host the newly reformed "Denver Spring Show" at the Crowne Plaza Hotel & Convention Center, 15500 E 40th Ave. Denver, Colorado. Over 70 retail and wholesale vendors, kids activities, free admission and parking. 9 a.m.-6 p.m. and 9 a.m.-5 p.m. Sunday. Second annual Colorado School of Mines Geology Museum Fundraiser and Social on Saturday from 6-9 p.m. Read more

April 22 – Earth Day Geology Hike on North Table Mountain

See the Table Mountain lava flows, the Denver Formation, and the zeolite locality in the middle lava flow at a former paving stone quarry. A 1.3-mile hike each way; meet at 9 a.m. at the trailhead at Easley Way & Ulysses Way, on the southeast side of North Table Mountain. Led by Pete Modreski, USGS. Info: pmodreski@usgs.gov, 303-202-4766.

April 23 – Geology of South Park

Presentation by Peter Barkmann, Colorado Geological Survey at the monthly meeting of the Florissant Scientific Society. Noon (lunch), 1 p.m. (lecture). Probably to be held at the Dinosaur Ridge, Dinosaur Discovery Center, Morrison. All are welcome. Read more

April 29-30 – Book/Garage Sale at the Colorado School of Mines Geology Museum

Thousands of maps, hundreds of books, journals, minerals, fossils and more. Prices vary by item or box. Most prices will drop throughout the event. 1310 Maple St., Golden 9 a.m.-4 p.m., Info: 303-273-3815.