60 mapped river miles, draining 362 square miles across Arenac, Ogemaw counties, in the Au Gres-Rifle subbasin watershed. 1 USGS gauge report water temperature on it, and this page reads it.
50°F and colder is cold, through cold-transitional and cool, to warm above 70°F — the same four bands, breaking at 58, 64 and 70°F, that the app paints. Grey is water nobody has measured.
Live from the USGS — every pill above is live, so the numbers you are reading are the latest continuous readings at each gauge. Provisional and unreviewed, as all real-time data is. If that fetch cannot happen — you are offline, or the USGS is down — the pills fall back to the last value we cached, 30 September 2026, 13:43 UTC. None of them, in fact: Sterling is not reporting water temperature — it has sent no water temperature for 720 days, since 8 October 2024. That pill carries a modelled temperature where one can be fitted, marked as modelled, and a dash where it cannot — never a stale reading dressed as a current one.
Temperature here rests on a gauge rather than a valley class. Rifle River near Sterling sits at river mile 4.9, covering a 54.9-mile reach, with a July mean of 71.7 F, a July range of 13.5 F and an uncertainty of 1.98 F over six Julys from 2019 through 2024; groundwater input is rated low. The gauge sits at the downstream end of its reach, so that mean stands for the warmest water in it and everything above runs colder. Type 3 regulations cover 54.1 of the 59.9 mapped miles, January 1st through December 31st, with Type 1 on 6.1 miles and a creel of five fish, no more than three 15 inches or greater. Median width is 40.7 feet on a fifth-order drainage of 362.47 square miles across Arenac and Ogemaw counties. Brown and rainbow trout stocking continues through 2026, heaviest at State Road - Selkirk at 25,311.8 per mile. Nineteen public units total 62,394 acres, with 13 access sites and 12 launches.
Each gauge carries a July mean built from its own daily record — 6 Julys, 2019–2024, measured rather than modelled. A July mean is what decides which of the four bands a stretch of water belongs to, because July is when a trout river either holds or does not.
| Reach | July mean | Band | Groundwater |
|---|---|---|---|
|
Sterling RM 59.9–4.9 |
71.7 °F | warm | low |
Every gauge sits at the bottom of its segment, so each number is the warm end and the water above it runs colder. ±1.98 °F on the fit.
The Rifle River is a Lake Huron tributary with 55.0 miles of run corridor on it — salmon, steelhead and lake-run brown trout, on their own calendar and under their own rules. Run timing, species and access on the Rifle River →
MDNR trout stream types, as designated. Types on file cover 60.2 of the 59.9 mapped miles; 0.0 miles carry no type in this dataset. Always check the current Michigan Fishing Guide before you fish — this is a copy, and the Guide is the rule.
| Type | Where | Season | Minimum sizes |
|---|---|---|---|
|
Type 1 6.1 mi |
RM 59.9–53.5 | Last Saturday in April–September 30th | Brook trout 7", Brown trout 8", Rainbow trout / steelhead 10", Lake trout 10", Chinook salmon 10", Coho salmon 10", Pink salmon 10", Atlantic salmon 10" |
|
Type 3 54.1 mi |
RM 53.5–0.0 | January 1st–December 31st | Brook trout 15", Brown trout 15", Rainbow trout / steelhead 10", Lake trout 10", Chinook salmon 10", Coho salmon 10", Pink salmon 10", Atlantic salmon 10" |
Creel across all types: 5 fish, with no more than 3 trout 15“ or greater. Zero (0) Arctic Grayling. Tackle: Artificial lures and all types of natural bait may be used.
River miles are measured above the mouth, along the mapped mainstem. The reach breaks are the gauges, which is also how the temperature model divides the river.
| Reach | Miles | July mean | Access on it |
|---|---|---|---|
|
RM 59.9–4.9 down to Sterling |
54.9 | 71.7 °F | 12 sites — Grebe Lake and 11 more |
13 mapped access sites on the mainstem: 1 walk-in, 12 boat or canoe launches. Source: MDNR.
Every gauge on the mainstem, upstream first. Links go to the USGS monitoring-location page for the site.
11 units of public or open-access land touch this river, 61,203 acres in total. Acreage is the whole unit, not the part beside the water.
| Unit | Owner | Acres |
|---|---|---|
| Au Sable State Forest - Gladwin Unit | Michigan Department of Natural Resources | 33,124 |
| Au Sable State Forest - Roscommon Unit | Michigan Department of Natural Resources | 20,136 |
| Rifle River State Recreation Area | Michigan Department of Natural Resources | 4,480 |
| Wigwam Bay State Wildlife Area | Michigan Department of Natural Resources | 2,892 |
| Gladwin Management Unit | Michigan DNR | 340 |
| Ogemaw County Fairgrounds | Ogemaw County Agricultural Society | 109 |
| Village Of Sterling Park | City | 80 |
| Moffatt Bridge Boating Access Site | Michigan Department of Natural Resources | 17 |
| MNRTF Parcel | State Dept. of Natural Resources | 14 |
| Omer Boating Access Site | Michigan Department of Natural Resources | 7 |
Stocked, per the MDNR record: Brown trout, Rainbow trout, Walleye. The most recent plants are Brown trout at Pas (Ogemaw Co., through 2026); Brown trout, Rainbow trout at State Road - Selkirk (Ogemaw Co., through 2026); Brown trout, Rainbow trout at Rifle River (Ogemaw Co., through 2026).
The measured record behind every temperature band on this page: the mean of the daily means for July, at each gauge, over the years USGS has one.
| Gauge | July mean | July range | Julys |
|---|---|---|---|
| Sterling | 71.7 °F | 13.5 °F | 6 |
53 insects are recorded from northern lower Michigan, which is the region this river sits in. That is a claim about the region and not a survey of this stream: nobody has recorded which of them has been caught here. Open the river in the app and the hatch panel will narrow it to the ones whose temperature window today's reading is inside.
| Insect | Peak | Water | Size |
|---|---|---|---|
| Fish Eggs Other |
October–January and April | 33–60°F | #10–16 |
| Little Black Stonefly Allocapnia / Capnia spp. |
January–April | 34–46°F | #16–18 |
| Little Brown Stonefly Taeniopteryx / Strophopteryx spp. |
February–April | 38–50°F | #12–16 |
| Blue-Winged Olive Baetis spp. |
March–May and September–November | 38–58°F | #16–22 |
| Blackfly Simulium spp. |
April–June | 40–65°F | #18–22 |
| Blue Quill Paraleptophlebia adoptiva |
April–May | 44–56°F | #16–18 |
| Cranefly Tipula spp. |
April–June and September–October | 40–65°F | #6–10 |
| Grannom Brachycentrus spp. |
April–May | 48–58°F | #14–16 |
| Green Rock Worm / Green Weenie Rhyacophila spp. |
April–June and September–October | 45–68°F | #10–14 |
| Hendrickson Ephemerella subvaria |
April–May | 45–58°F | #12–14 |
| Little Black Caddis Chimarra atterima |
April–May | 46–58°F | #16–20 |
| Alderfly Sialis spp. |
May–June | 52–66°F | #10–14 |
| Caterpillar Lepidoptera larvae |
May–September | 55–75°F | #8–14 |
| Crayfish Orconectes spp. |
May–October | 55–78°F | #4–8 |
And 39 more — the year-round records, mostly: midges, scuds and sculpins, which are in the water every day and are therefore never the news.
25 named streams meet this one. Confluence miles are above the mouth; the longest twelve are listed.
Rifle River sits in HUC 8 04080101, the Au Gres-Rifle subbasin, and drains 362 square miles, Strahler order 5 at the mouth. 115 NHD reaches carry the name for 68.0 miles in total — more than the 59.9 miles of drawn mainstem, because NHD counts side channels and braids as their own reaches.
The closest 6 rivers on this site, straight-line from the middle of this one — not drive time.