The Latest on how the government shutdown is affecting national parks (all times local):

2:45 p.m.

A monument and museum dedicated to the victims of the 1995 Oklahoma City bombing is open to visitors amid the government shutdown.

Kari Watkins, executive director of the Oklahoma City National Memorial and Museum, said Saturday the center is affiliated with the National Park Service but is owned and operated by the Oklahoma City National Memorial Foundation.

Watkins says Park Service rangers aren't on site but are being replaced by museum and memorial staff members.

The memorial includes a reflecting pond and metal chairs in honor of the 168 people who died in the bombing.

10:30 a.m.

Yosemite National Park in California is open to visitors despite the government shutdown but there'll be nobody to greet them, help them navigate the trails or even make sure they're in the right campground.

Spokesman Scott Gediman says the park that boasts the famous granite cliffs of Half Dome and El Capitan can't pay all of its people so rangers are being furloughed.

The visitor center is closed, along with some restrooms because there's nobody to clean them. Campground visitors with reservations may find someone else in their spot because nobody will be checking.

Gediman says rangers and other staff are coming in to receive their furlough letters, then going home and waiting to see how long they'll be out of work.

Some medical staff remains on the job and Gediman says privately operated concessions such as stores, hotels and restaurants are open.

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10:35 a.m.

Visitors can still ride snowmobiles and snow coaches into Yellowstone National Park to gaze at the geysers and buffalo herds, despite the federal government shutdown.

The historic park in northwest Wyoming was open under a blanket of fresh snow on Saturday.

Visitor centers and other facilities run by the National Park Service were closed, but privately operated hotels, tour services and gift shops were open.

Xanterra (zan-TEHR'-uh) Parks & Resorts and other private companies that serve visitors at Yellowstone said they would groom Yellowstone's snow-packed roads for up to a week to keep them open for snowmobiles and snow coaches — small buses with tank-like tracks.

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10 a.m.

The snowy mountains and frozen lakes of Rocky Mountain National Park are still accessible to visitors, despite the federal government shutdown.

But across the country in New York, the nation's most famous monuments to immigration — the Statue of Liberty and Ellis Island — were closed Saturday.

The National Park Service oversees both natural wonders and historic landmarks across the nation. The park service's parent agency, the Interior Department, had vowed to keep as many parks and public lands open as possible during the shutdown, which began at midnight Friday on the East Coast.

But by mid-day Saturday, the pattern was spotty.

The USS Constitution, the 220-year-old warship anchored at Charlestown Navy Yard in Boston, was open, but Boston's Bunker Hill Monument was closed.