Keystone Gas Prices - Find the Lowest Gas Prices in Keystone, SD

Search for the lowest gasoline prices in Keystone, SD. Find local Keystone gas prices and Keystone gas stations with the best prices to fill up at the pump today

National and South Dakota Gas Price Averages

National Avg.	SD Reg. Avg.	SD Plus Avg.	SD Prem. Avg.	SD Diesel Avg.
$3.160 12/15/2025	$2.986 12/15/2025	$3.195 12/15/2025	$3.638 12/15/2025	$3.399 12/15/2025

Today's lowest gas prices in South Dakota and around Keystone

Station	Regular	Plus	Premium	Diesel
Freedom 615 9th St SE, Watertown, SD	$2.32 12/15/2025	12/15/2025	12/15/2025	12/15/2025
Freedom 220 10th St SW, Watertown, SD	$2.32 12/15/2025	12/15/2025	12/15/2025	12/15/2025

Find all gas prices in and around Keystone, SD.

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Holiday Express

Saturday, Dec 20, 2025

Hill City, SD

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Holiday Express

Sunday, Dec 21, 2025

Hill City, SD

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Christmas Nights of Lights

Friday, Dec 26, 2025 from 5:30pm to 8:30pm

Rapid City, SD

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Rapid City Rush vs. Tahoe Knight Monsters

Friday, Dec 26, 2025 at 7:05pm

Rapid City, SD

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Winter Express

Saturday, Dec 27, 2025 at 1:45pm

Hill City, SD

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Christmas Nights of Lights

Saturday, Dec 27, 2025 from 5:30pm to 8:30pm

Rapid City, SD

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Rapid City Rush vs. Tahoe Knight Monsters

Saturday, Dec 27, 2025 at 7:05pm

Rapid City, SD

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Winter Express

Sunday, Dec 28, 2025 at 1:45pm

Hill City, SD

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Christmas Nights of Lights

Sunday, Dec 28, 2025 from 5:30pm to 8:30pm

Rapid City, SD

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Rapid City Rush vs. Tahoe Knight Monsters

Wednesday, Dec 31, 2025 at 7:05pm

Rapid City, SD

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In and Around Keystone, SD

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Nr	Query	Num. rows	Took (ms)
1	db.towns.find( {"sef_url":"big-lake-mn"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	275
2	db.sites.find( {"hostname":{"$in":["americantowns.com","localword"]}}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	194
3	db.towns.find( {"sef_url":"keystone-sd"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	64
4	db.pages.find( {"type":"town","slug":{"$in":["gas-prices"]},"site.hostname":"americantowns.com"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	12
5	db.modules.find( {"name":{"$in":["Header Menu Main","header script","footer menu","footer script"]}}, [] ).sort( [] ).limit( 0 ).skip( 0 )	4	4
6	db.events_cache.find( {"_id":"f52bb441e43ed5182eb5892da52af4bd"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	1
7	db.events.find( {"_id":{"$in":[ObjectId ("68f9673934c9e7cdf6042e5c"),ObjectId ("68f9673934c9e7cdf6042e5d"),ObjectId ("68fd07a5fd969f5f110551f7"),ObjectId ("68941fc0fb5e4bed1fb9451e"),ObjectId ("68fd0af6b968d244290c2f03"),ObjectId ("68fd07a5fd969f5f110551f8"),ObjectId ("68941fc0fb5e4bed1fb94577"),ObjectId ("68fd0af6b968d244290c2f04"),ObjectId ("68fd07a5fd969f5f110551f9"),ObjectId ("68941fc0fb5e4bed1fb94622")]}}, [] ).sort( {"start":1} ).limit( 11 ).skip( 0 )	10	1
8	db.towns.find( {"sef_url":"keystone-sd"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	15
9	db.tokens.find( {"sef_url":{"$in":["usa","sd","pennington-county-sd","keystone-sd"]}}, [] ).sort( [] ).limit( 0 ).skip( 0 )	4	2
10	db.modules.find( {"name":"AT - Header Script"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	6
11	db.modules.find( {"name":"AT - Header Section"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	182
12	db.modules.find( {"name":"AT - Nearby Towns"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	109
13	db.modules.find( {"name":"AT - Nav Bar"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	43
14	db.modules.find( {"name":"CV Cancel"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	8
15	db.modules.find( {"name":"AT - Footer Section"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	10
16	db.modules.find( {"name":"AT - Footer Script"}, [] ).sort( [] ).limit( 1 ).skip( 0 )	1	16