Overview
The Western Center for Archaeology and Paleontology (WCAP) sits on the eastern shore of Diamond Valley Lake near Hemet in Riverside County, California. It was established to house and interpret the extraordinary collection of Ice Age fossils unearthed during the construction of Diamond Valley Lake in the 1990s — one of the largest paleontological salvage projects ever undertaken in North America.
Excavations recovered tens of thousands of specimens representing more than 100 species, including Columbian mammoths, mastodons, giant ground sloths, saber-toothed cats, dire wolves, and American lions. The scale of the find was remarkable: crews worked around the clock to extract fossils before the reservoir was flooded, making the project as much a race against time as a scientific endeavor.
The museum building itself is architecturally notable, designed to complement the surrounding landscape of the Inland Empire foothills. Inside, life-size skeletal mounts, hands-on exhibits, and interpretive displays tell the story of this region some 10,000 to 200,000 years ago, when it was a grassland teeming with megafauna. The center is operated by the Metropolitan Water District of Southern California and serves as both a public museum and an active research repository.
Before You Go
Admission and Hours
Admission fees and opening hours are subject to change; verify current details on the Metropolitan Water District's official website or call the center directly before visiting. The museum has historically been closed on Mondays and major holidays, but confirm this locally.
What to Bring
- Comfortable walking shoes; the facility includes outdoor interpretive areas
- Water and sun protection, especially in summer when temperatures in the Hemet valley regularly exceed 38 °C (100 °F)
- A camera — the skeletal mounts are photogenic and photography is generally permitted in public areas
Accessibility
The facility was purpose-built and is generally wheelchair accessible. Contact the center in advance if you have specific accessibility needs.
Visas
The United States has its own visa and entry requirements. For guidance specific to your nationality, visit TravelerPulse's Visas section and check the official US Customs and Border Protection or Department of State websites.
Getting There
By Car
The Western Center is the most practical way to reach this destination. It is located off Domenigoni Parkway in Hemet, roughly 90 miles (145 km) southeast of downtown Los Angeles. From Los Angeles, take Interstate 10 east to State Route 79 south or use the 215 freeway south to State Route 74. Parking on site is available and has historically been free, though verify this locally.
By Public Transit
Public transit options to this specific location are limited. Riverside Transit Agency (RTA) serves the broader Hemet area; check current routes and schedules on the RTA website, as stops may require a significant walk or a rideshare connection to reach the museum.
Nearest Airports
- Ontario International Airport (ONT) — approximately 50 miles (80 km) northwest; the most convenient regional airport
- Los Angeles International Airport (LAX) — approximately 90 miles (145 km) west; larger flight selection but longer drive
- Palm Springs International Airport (PSP) — approximately 50 miles (80 km) east; smaller but can be convenient depending on your origin
Things to See & Do
Inside the Museum
- Fossil Hall: The centerpiece of the museum features life-size mounted skeletons of Columbian mammoths and other Ice Age megafauna recovered directly from the Diamond Valley Lake excavation site.
- Excavation Pit Exhibit: An indoor simulated dig site gives visitors — particularly children — a tactile sense of how paleontologists extract and identify specimens.
- Research Collections: The center holds tens of thousands of catalogued specimens; researchers can inquire about collection access through the museum's curatorial staff.
- Interpretive Programs: The museum offers educational programs for school groups and the public; verify current program schedules on the official site.
Around Diamond Valley Lake
The reservoir itself is managed for recreation including fishing and non-motorized boating on certain days. Access and permits for lake recreation are managed separately by the Metropolitan Water District — check their site for current rules and access conditions before planning a combined visit.
Nearby Nature
The surrounding hills offer views of the San Jacinto Mountains and the broad Hemet valley. The area is a good base for exploring the broader San Jacinto Valley, which has its own mild natural and historical character.
Food & Drink
The Western Center itself does not operate a full restaurant. There may be vending or a small café area on site — verify locally before your visit if you are relying on on-site food.
Hemet, the nearest town, is approximately 5–10 miles from the museum and has a full range of casual dining options including national chains and independent family restaurants. The city of Hemet serves a largely local residential population, so dining reflects everyday American fare rather than tourist-oriented cuisine. Temecula, roughly 25 miles to the southwest, offers a wider restaurant selection and is home to a notable wine country region if you are extending your visit.
Practical Information
Emergency Services
Dial 911 for all police, fire, and medical emergencies in the United States.
Connectivity
Cellular coverage in the Hemet valley is generally reliable on major US carriers. The museum may offer Wi-Fi; confirm on-site.
Climate Note
The Inland Empire and San Jacinto Valley can experience extreme summer heat. Plan outdoor portions of your visit in the morning and carry adequate water. Winters are mild but evenings can be cool.
Combining Visits
This destination works well as part of a broader Inland Empire day trip or a stop on a route between Los Angeles and Palm Springs. The drive along State Route 74 through the San Jacinto Mountains toward Palm Desert is scenic and can extend a visit meaningfully.
Safety
The Western Center and surrounding area present no unusual safety concerns for visitors. Standard travel precautions apply: secure valuables in your vehicle, stay hydrated in summer heat, and be aware that mountain roads in the region can have sharp curves and limited shoulders.
In the unlikely event of a flash flood warning — which can occur in desert-adjacent valleys during summer monsoon patterns — follow local emergency guidance immediately.
