Agate Fossil Beds Visit Guide

Agate Fossil Beds National Monument

Best primary window for Agate Fossil Beds: July, with August and September as strong shoulder months.

In the early 1900s, paleontologists unearthed the Age of Mammals when they found full skeletons of extinct Miocene mammals in the hills of Nebraska -- species previously only known through fragments. At the same time, an age of friendship began between rancher James Cook and Chief Red Cloud of the Lakota. These two unprecedented events are preserved and protected here... at Agate Fossil Beds.

This page identifies Agate Fossil Beds National Monument from the checked-in NPS snapshot, dated source cards, and the month windows listed here.

Targeted Impressions Data TeamData Science & Intelligence

materializedData snapshot: October 27, 20264 source cards

Answer-first planning signal

Best current use

Agate Fossil Beds National Monument is listed as a National Monument in the checked-in NPS identity snapshot.

Best months

July, August, September

Peak crowd months

July, August, June

Current signal

Agate Fossil Beds National Monument is listed as a National Monument in NE in the checked-in NPS identity snapshot. 4 source cards on this page. Data snapshot: October 27, 2026. Official NPS page: https://www.nps.gov/agfo/index.htm.

Visitor takeaway

Month windows for Agate Fossil Beds National Monument are listed on this page. Official NPS page: https://www.nps.gov/agfo/index.htm.

What it sounds like

Agate Fossil Beds audio on this page is a labeled modeled cue, not a field recording.

Summary at a glance

Agate Fossil Beds National Monument is listed as a National Monument in the checked-in NPS identity snapshot. 4 source cards on this page. Data snapshot: October 27, 2026. Listed month windows: July, August, and September.

Best Months

July

↑ August, September

Budget Months

September

October, May

Peak Crowd

July

August, June

Region

rocky mountain

Core Experiences

farming-and-agricultureranchesnative-american-heritagewestward-expansionhomesteadingArts and CultureCultural DemonstrationsAstronomyStargazingFood

Month-by-month

Month windows on this page: July, August, and September listed as the primary window; July, August, and June listed as peak months; September, October, and May listed as lower-crowd months.

Primary Window

Listed primary window: July, August, and September.

Peak months

Listed peak months: July, August, and June.

Lower-crowd months

Listed lower-crowd months: September, October, and May.

Getting there

Use the closest major airport and a regional drive plan for Agate Fossil Beds.

From US 20: 22 miles south of Harrison, NE on State Hwy 29, then three miles east on River Road (paved) From US 26: 34 miles north of Mitchell, NE on State Hwy 29, then three miles east on River Road (paved). From State Hwy 71: 25 miles west on the unpaved portion of River Road.

SERPRadio Origin Research

Place instrument

Clock, compare, and listen

Compare places

Season and now

Twelve-month planning is modeled from the published seasonal profile. The current hand stays unavailable until sourced alerts, hours, events, roads, and weather are fresh.

Current hand: Not available

Three listening lanes

Official NPS audio: Not provided for this snapshot.

Synthetic browser audio, never a field recording or live observation.

Jamcorder: Shared station.

Text equivalent for the seasonal place clock
Month	Visitability	Crowd pressure
January	41	12
February	43	12
March	48	16
April	53	28
May	57	46
June	57	72
July	60	90
August	60	86
September	59	70
October	57	38
November	50	18
December	43	12

The cue is a browser-generated composition, not a field recording. How NPS Sounds modeled audio works.

Methodology

This page uses the checked-in NPS identity snapshot for Agate Fossil Beds National Monument, the 4 source cards below, and the figures listed above. Data snapshot: October 27, 2026. Read the NPS Sounds methodology and about NPS Sounds for how pages are assembled.

Data snapshot: October 27, 2026
Source cards: 4

Data Behind This Reading

Source provenance

NPS identity

high

Agate Fossil Beds National Monument is identified as National Monument with NPS code agfo.

Available · Data snapshot: October 27, 2026

Source

Official operations

limited

Official alerts should be verified on the NPS page. This site uses a checked-in snapshot, not a live operations feed.

From the data snapshot · Data snapshot: October 27, 2026

Source

Weather and seasonality

limited

Summers can be very warm, high 90's to 100 with the frequent afternoon thunderstorms. Plan to hike early and come down from the higher points if storms threaten. Winter temperatures can dip as low as -20 with snow and wind. Heaviest snows can be expected in late Spring.

Modeled · Data snapshot: October 27, 2026

Source

How this page is assembled

limited

place page source cards come from the data snapshot October 27, 2026.

Data snapshot: October 27, 2026

Source

Where Agate Fossil Beds National Monument fits

State, region, and designation hubs that list this place.

More Rocky Mountain visit guides

Other source-reviewed places in the same region.