Mobile Coverage Still Spotty for Some Visitors at U.S. National Parks

Using Ookla’s Speedtest Intelligence data, we analyzed mobile connectivity at 42 of the most frequently visited U.S. National Parks and found that in 10 of the most popular parks, the median download and median upload speeds of the three big national providers — AT&T, T-Mobile and Verizon — varied dramatically.  In addition, we found that in some of these popular parks, low-Earth orbit (LEO) satellite provider Starlink delivered median download  and upload speeds that were equal to, or better, than those of the big three providers. 

• Starlink users experienced faster median download speeds than those from any of the top mobile providers in four of the most visited US national parks during the first seven months of 2025. 
• T-Mobile had faster median download speeds than AT&T and Verizon in six of the 10 most popular US national parks for the first seven months of 2025. The operator also had higher median upload speeds than its mobile operator peers in those same six parks during the same time period. 
• Sequoia, Mount Rainier, and Grand Teton National Parks had the fastest median download speeds among the 42 major national parks we monitored in the first seven months of 2025. Sequoia was No. 1 with the highest median download speed of 163.3 Mbps.
• Death Valley, Kings Canyon, and Redwood National Parks had the slowest median download speeds of all the 42 national parks in the first seven months of 2025. Death Valley had the slowest median download speed at just 7.56 Mbps.