BAYFIELD, Wis. (AP) Apostle Islands National Lakeshore officials say the popular ice caves are set to open to the public Saturday if conditions don't change.

The National Park Service made the announcement Wednesday. But officials urge caution for people who make the trek on Lake Superior ice.

Minnesota Public Radio News reports lakeshore planning chief Julie Van Stappen warns the ice is slippery.

Van Stappen says unlike last year, "it's almost glare ice for a good chunk of the way." Officials recommend people use crampons and use ski poles.

The ice caves drew more than 138,000 tourists last year as the deep freeze made the caves accessible to pedestrians for the first time in nearly five years. The park system plans a $5 fee this year for visitors age 16 and older.

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Apostle Islands ice caves set to open Saturday