For a typical 7-day California adventure, from scaling peaks in Yosemite National Park to navigating coastal routes, an eSIMAdventures plan with 5-10 GB of data usually suffices. This allows for critical trail navigation, uploading breathtaking photos of Big Sur, checking weather forecasts for mountain passes, and staying connected with your expedition team. While some visitor centers offer Wi-Fi, relying on your eSIM for consistent data, especially in more remote areas or on the road with partners like Verizon, ensures uninterrupted connectivity and safety.
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How much mobile data (GB) do I need for a week-long California expedition, including Yosemite and coastal drives?
Updated May 30, 2026
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