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Underfoot changes slightly more quickly than the rocks it describes. Here are a few recent ones, starting with packs for all 50 US states. Here's a part of Wyoming:

Underfoot

@underfoot.rocks

You can now search for packs and show packs near you.

Underfoot

@underfoot.rocks

Symbology for marshes and ice. There's a lot of ice in Alaska, it turns out.

26/10/26, 6:48 pm0 reposts0 likes

Underfoot

@underfoot.rocks

@openstreetmap.bsky.social waterway data for certain packs (currently just the SF Bay Area). More complete than the NHD for culverted urban creeks (though probably less complete in more data-sparse areas). Here's a trace from Lake Temescal to the Bay in Oakland, CA, which is mostly underground.