| Activities | Fishing#Rafting#River Fishing#RV Camping#Swimming#Tent Camping |
| AltSiteTypes | Fishing Access Site#Public Access Site#Recreation Area Campground |
| Amenities | Boat Launch |
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| CreatedBy | dbo |
| DateCreated | 11/2/2025 5:01:12 PM |
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| Directions | Grant Marsh is located 6.7 miles north of Hardin on Montana Highway 47, then .9 mile east on Grant Marsh Lane.1 |
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| Email | fwprg52@mt.gov |
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| Latitude | 45.8450 |
| Longitude | -107.5910 |
| MailingCity | Billings |
| MailingFirm | Montana Fish, Wildlife & Parks |
| MailingState | MT |
| MailingStreet | 2300 Lake Elmo Drive |
| MailingZip | 59105 |
| NetDescriptions | Grant Marsh is a fishing access site with a boat launch. Camping is allowed with access for camp trailers and there is a 7 day limit. |
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| PhoneNo1 | 406-247-2940 |
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| SeasonOfOp | All Year |
| ServiceCity | Hardin |
| SiteId | 3965 |
| SiteMembers | 1|http://www.visitmt.com|Y#11|http://www.wintermt.com|#32|http://www.lewisandclark.state.mt.us|#94|http://indiannations.visitmt.com| |
| SiteName | Grant Marsh Fishing Access Site |
| SiteRegion | Custer |
| SiteRegMem | CUSTER |
| SiteType | Fishing Access Site |
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| Url | http://fwp.mt.gov |