Mojave Desert Land Trust aerial tour shows splendor of national monument whose status could be reassessed.

PALM SPRINGS — Storm clouds hovered over the city and patches of rain fell from above the nearby San Jacinto Mountains, but two Mojave Desert Land Trust officials arrived at the international airport here last week ready for a celebration.

Staff at the Joshua Tree-based nonprofit recently completed plans to commemorate the upcoming third anniversary of Mojave Trails, Sand to Snow and Castle Mountains national monuments.

All three were established Feb. 12, 2016, by former President Barack Obama through use of the Antiquities Act. Combined, they encompass nearly 1.8 million acres in the Mojave, Colorado and Sonoran deserts.

To offer a comprehensive view, MDLT partnered with the nonprofit EcoFlight for a series of flyovers within the Mojave Trails National Monument, which boasts 1.6 million acres and is the largest national monument in the 48 contiguous states, according to MDLT Communications Director Jessica Dacey.

Shortly before 10 a.m. Tuesday, Dacey and MDLT Education Coordinator Adam Henne briefed a group of passengers that included a Daily Press reporter and photographer.

“You get a bit of a buzz when you go up there,” Dacey said. “Especially coming from this angle ... you start to understand the seamlessness between the parks.”

Tuesday’s flight traveled first above Joshua Tree National Park, then over Sheep Hole Pass, which served as the Cessna 210’s entrance into Mojave Trails.

For Dacey and others, part of the monument’s importance is its function as a wildlife corridor connecting the national park and the Mojave National Preserve, the more than 1.5-million-acre swath of National Park Service land between interstates 15 and 40.

Within the monument, the Cady Mountains serve as one of the best areas in the Mojave Desert to see bighorn sheep, according to MDLT.

The North American population of the muscular animal with curved horns was once estimated in the millions. By 1900, human encroachment diminished bighorn sheep numbers to several thousand, National Wildlife Federation statistics show. Conservation efforts have since brought those numbers up to nearly 8,000.

Bonanza Spring, located near the monument’s northern border, is the only wetland for 1,000 square miles. Like the Cady Mountains, the spring is also home to bighorns and 70 bird species.

Dacey said the habitat connectivity created with the monument’s establishment allows many animals to roam, helps increase their populations and protects plant life they need to survive.

There are also unique historical and cultural aspects to the monument’s significance, she said.

Mojave Trails is home to the longest undeveloped section of U.S. Route 66. Preservation of the “Mother Road,” according to the World Monuments Fund, would equal positive economic effects like “sustainable tourism.”

The monument also includes some of the best-preserved sites from the World War II-era Desert Training Center where, under the command of Gen. George S. Patton, more than a million troops were trained on 18,000 square miles for desert combat in North Africa.

Deep within the vast expanse visible through the Cessna’s starboard-side windows, another geographical feature appeared, albeit inconspicuously from 2,500 feet above the desert floor.

The Cadiz Dunes Wilderness spans nearly 20,000 acres in the heart of the monument. The dunes appear to “hum in the wind,” Dacey told passengers.

“I think they’re more majestic than the Kelso Dunes in the Preserve,” she said.

Bruce Gordon, who piloted the Cessna, nodded in agreement from behind his aviators. Gordon founded EcoFlight in 2002 to advocate for environmental protection via programs and aerial visuals that expand public awareness of wild lands.

He couldn’t help but take his hands off the Cessna’s yoke to capture photographs of the pristine topography below. He used the 80-minute flight to share his own knowledge of the region.

Several concerns were noted, as well.

One, MDLT contends, is Cadiz Inc.’s planned water project, which would pull 50,000-acre-feet of water a year from an ancient aquifer beneath the Mojave Desert. The water would later be sold in Southern California.

Cadiz owns roughly 34,000 acres within Mojave Trails, Dacey said. Company officials have said the pumping would not harm the environment. Rather, the project would conserve surplus water lost to evaporation at nearby dry lakes.

Cadiz’s research maintains that Bonanza Spring would not be impacted by pumping. Other research published in 2018 called the company’s findings into question and said the project would threaten Bonanza Spring, according to MDLT, which funded some of the research.

Cadiz CEO and President Scott Slater has stated the company is confident of no interconnection between groundwater and water levels in Bonanza Spring, the company’s website shows.

MDLT officials say the project could harm the bighorns that use Bonanza Spring. Dacey said a pipeline for the project has not yet been constructed.

Gordon navigated the plane toward Amboy Crater, situated about three miles southwest of Roy’s Motel and Cafe. At 80,000 years old, Amboy is “North America’s youngest volcano,” Dacey said.

MDLT is one of several environmental groups working to secure Mojave Trails’ status, which Dacey said is “in limbo.”

In April 2017, President Donald Trump issued an executive order directing Interior Department Secretary Ryan Zinke — who resigned his post last month — to review national monuments of at least 100,000 acres that have been designated since 1996.

Trump’s goal was to determine whether the monuments needed reduction or elimination. Mojave Trails was subsequently included for review. Trump called the monuments, particularly Bear Ears National Monument in Utah, a “massive federal land grab.”

An initial report released in December 2017 included changes to 10 monuments. That same month, Trump signed proclamations that scaled back Bear Ears, as well as Grand Staircase-Escalante National Monument. In doing so, he declared, “Public lands will once again be for public use.”

Mojave Trails has not been altered, but Dacey said it’s never officially been declared safe.

When the monument was established, a management plan had to be drawn up by this month. That process was halted amid the Interior Department’s review. MDLT is part of a coalition working on a community proposal for a management plan. Dacey said the expectation is for it to guide future planning for Mojave Trails.

In 2016, visitors to Joshua Tree National Park more than doubled to over 2.5 million, prompting Park Superintendent David Smith to declare it was being “loved to death.” Dacey said attendance now is well over 3 million per year.

Amid the rise in popularity, as well as a massive clean-up effort underway in the damaged park following the partial federal government shutdown, groups are hoping to increase awareness of places like Mojave Trails as alternative destinations.

The question MDLT wants people to ask is, “What do these other public lands have to offer?” Dacey said.

From overhead, the answer seems simple enough.

Matthew Cabe can be reached at MCabe@VVDailyPress.com or at 760-951-6254. Follow him on Twitter @DP_MatthewCabe.