"It's appalling that Congress can't work things out, but a huge relief that the states are able to step in," he said.
Services at the Grand Canyon were expected to be limited during the first 48 hours as vendors restock. The first meal at El Tovar Hotel on the South Rim was planned for Saturday night.
Park concessionaire Xanterra Parks & Resorts said overnight mule rides and motorcoach tours within the park will resume Sunday.
The funding to reopen the park came from the state Office of Tourism, the town of Tusayan and private businesses. Tusayan Mayor Greg Bryan presented a check for $426,500 to Brewer during a Saturday news conference.
Grand Canyon Superintendent Dave Uberuaga said the long weekend was a major driver in talks to resume park operations. He said the agreement with Arizona includes an option to extend the opening of Grand Canyon past seven days if needed.
"It's going to be a significant economic boost to everybody," he said. "Hopefully, we can have a continuing resolution by the time we run through the state of Arizona agreement and their funding."
Other national parks and monuments in Arizona remain closed. The exception is Glen Canyon National Recreation Area, which stretches into Utah. Utah governor Gov. Gary Herbert sent $1.67 million to the U.S. government to open the recreation area that includes Lake Powell, and other sites in Utah.
Brewer said she would push Congress to reimburse Arizona for funding the Grand Canyon.
"Arizona should not have to pay the federal government's tab here," she said. "It's their responsibility. The president and Congress should get up and do their jobs and negotiate an end to this shutdown as soon as possible."
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