Montana · River fishing · Cut Bank

Sullivan Bridge

May–Sep
best months

Sullivan Bridge is a Bureau of Land Management river access site on the headwaters of the Marias River in Glacier County, Montana, about 6 miles from the town of Shields Crossing. The Marias River begins here at the confluence of the Two Medicine River and Cut Bank Creek, and the access sits at the edge of this confluence, where gravel road access meets sheer cliffs and riparian vegetation. The river flows southeast from this point, and the Tiber Dam downstream forms Lake Elwell. About 50 miles beyond the dam, the Teton River joins the Marias before the river enters the Missouri River at Loma. The Marias was named in 1804 by Meriwether Lewis for his cousin, Maria Wood. There are no fees to use the Sullivan Bridge launch site, and it is not reservable. The other BLM river access sites in the area are Pugsley Bridge Recreation Area and Moffat Bridge Recreation Area, with Moffat Bridge just 0.1 mile away. Summer is the most comfortable time to visit. Typical averages from a nearby weather station at Cut Bank show July and August highs around 80°F with lows near 50°F, while winter highs stay around freezing.

Local outfitters

Not on Roamze yet. Their page has how to reach them.

  • Best time to go · May–Sep

    Best time to visit Sullivan Bridge

    Best months: May–September. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.

    1. Jan

      32° / 11°

      4 wet

    2. Feb

      34° / 12°

      4 wet

    3. Mar

      43° / 20°

      6 wet

    4. Apr

      52° / 28°

      8 wet

    5. May

      62° / 37°

      10 wet

    6. Jun

      70° / 45°

      11 wet

    7. Jul

      80° / 50°

      7 wet

    8. Aug

      80° / 48°

      6 wet

    9. Sep

      69° / 40°

      6 wet

    10. Oct

      54° / 30°

      5 wet

    11. Nov

      41° / 20°

      4 wet

    12. Dec

      33° / 13°

      4 wet

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Cut Bank Muni Ap, MT, 10.6 mi away at 3,838 ft. The station sits about 600 ft higher than this place, so expect it a little warmer here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

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