Jumbo Reservoir Fishing
A 1,411-acre Colorado reservoir in Sedgwick County and Logan County at 3,706 feet.
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A quick portrait of Jumbo Reservoir
Measured from the CPW water layer, Jumbo Reservoir is a reservoir of some 1,411 acres in Sedgwick County and Logan County. Expect thin air: this water sits near 3,706 feet. The surrounding property is Jumbo Reservoir SWA, per CPW. Sedgwick is the nearest Census place to the shore, near 6 miles off. Fisheries staff of the CPW Southwest Region oversee it.
The CPW species field names black bullhead, black crappie, bluegill, channel catfish, common carp and green sunfish. CPW maps 4 boat ramps on it. Craft permitted, per CPW: Motor boats (gasoline). Atlas notes: medium to reach, high pressure. On ice: ice fishing listed as yes.
CPW Fishing Atlas 2025 layers (waterbody outline, Boatable Waters, fishing locations), Census places, retrieved October 25, 2026.
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Listed fish for Jumbo Reservoir, each linked where Colorado has a species page.
CPW Boatable Waters species field, CPW state records and stocking report, retrieved October 25, 2026.
Ramp access for Jumbo Reservoir
- Jumbo Reservoir (Julesburg) SWA near Sedgwick (east)boat ramp, high-water ramp, condition good, CDOW
- Jumbo Reservoir (Julesburg) SWA near Sedgwick (north)boat ramp, universal-water ramp, condition excellent, ANS inspection, CDOW
- Jumbo Reservoir (Julesburg) SWA near Sedgwick (south)boat ramp, universal-water ramp, condition good, CDOW
- Jumbo Reservoir (Julesburg) SWA near Sedgwick (west)boat ramp, high-water ramp, condition good, CDOW
Mapped access at Jumbo Reservoir
- Jumbo Reservoir fishing access near Sedgwickmedium access, stocked: warmwater, 3,706 ft
CPW boat ramp and Fishing Atlas fishing location layers, retrieved October 25, 2026.
Limits a warden checks at Jumbo Reservoir
| Species | Bag and possession | Season |
|---|---|---|
| Trout, arctic char, grayling, salmon and whitefish (not kokanee) | Daily bag 4, possession 8, in aggregate | Open all year, day and night, unless a special regulation says otherwise |
| Brook trout 8 inches or less (bonus) | Daily bag 10, possession 10 | Open all year, day and night, unless a special regulation says otherwise |
| Kokanee salmon | Daily bag 10, possession 10 | Open all year, day and night, unless a special regulation says otherwise |
| Walleye, saugeye and sauger | Daily bag 5, possession 5, in aggregate | Open all year, day and night, unless a special regulation says otherwise |
| Largemouth, smallmouth and spotted bass | Daily bag 5, possession 5, in aggregate | Open all year, day and night, unless a special regulation says otherwise |
| White bass, striped bass and wiper | Daily bag 10, possession 10, in aggregate | Open all year, day and night, unless a special regulation says otherwise |
| Channel, flathead and blue catfish | Daily bag 10, possession 10, in aggregate | Open all year, day and night, unless a special regulation says otherwise |
| White and black crappie | Daily bag 20, possession 20, in aggregate | Open all year, day and night, unless a special regulation says otherwise |
| Bluegill and other sunfish | Daily bag 20, possession 20, in aggregate | Open all year, day and night, unless a special regulation says otherwise |
| Yellow perch | Daily bag 20, possession 20 | Open all year, day and night, unless a special regulation says otherwise |
| Tiger muskie | Daily bag 1, possession 1; at least 36 inches long | Open all year, day and night, unless a special regulation says otherwise |
| Northern pike and bullhead | No bag or possession limit | Open all year, day and night, unless a special regulation says otherwise |
For the statewide limits chart, Jumbo Reservoir counts as east of the Continental Divide water. Unless listed in the brochure special regulations, Jumbo Reservoir follows the statewide chart.
Local fishing rules at Jumbo Reservoir
| Water as printed | Rule | Brochure |
|---|---|---|
| Jumbo (Julesburg) Reservoir | Min. size for wiper is 15 inches long. Min. size for crappie is 10 inches long. Min. size for walleye and saugeye is 15 inches long. Only 1 walleye or saugeye in the aggregate longer than 21 inches may be taken per day. | p. 26 |
Special regulations as printed in the 2026 Colorado Fishing brochure (CPW, season March 1, 2026 to March 31, 2027), pp. 11 to 39, checked against CPW Chapter W-1 (as approved 13 November 2025); retrieved October 2026.
Statewide bag and possession chart, 2026 Colorado Fishing brochure (CPW, season March 1, 2026 to March 31, 2027), p. 10, retrieved October 25, 2026.
Stocking report listings for Jumbo Reservoir
Jumbo Reservoir appears 2 listings on the CPW trout report, most recently May 22, 2026.
| Report date | What CPW lists |
|---|---|
| May 22, 2026 | catchable trout, CPW Southwest Region |
| June 6, 2025 | catchable trout, CPW Southwest Region |
CPW Fish Stocking Report (catchable trout of about 10 inches; the date is when CPW added the water to its weekly list), 2024 to October 2026, retrieved October 25, 2026. Colorado stocking.
Record catches logged at Jumbo Reservoir
| Species | Category | Weight or length | Angler | Year |
|---|---|---|---|---|
| Freshwater Drum | heritage length (to 2019) | 32 inches in | Keith Thompson |
CPW state records by weight and catch-and-release length, 2026 Colorado Fishing brochure (CPW, season March 1, 2026 to March 31, 2027), retrieved October 25, 2026. All Colorado records.
Nearby water compared with Jumbo Reservoir
| Lake | Distance | Acres | Elevation ft | Boat ramps | On the trout report |
|---|---|---|---|---|---|
| Jumbo Reservoir | 1,411 | 3,706 | 4 | yes | |
| Jumbo Annex | 2 miles southwest | 95 | 3,679 | 0 | |
| Jeff's Pond | 20 miles southwest | 3 | 4,237 | 0 | |
| DePoorter Lake | 21 miles east | 7 | 3,455 | 0 | |
| North Sterling Reservoir | 34 miles west | 2,752 | 4,069 | 2 | |
| Overland Trail Park Pond | 35 miles southwest | 5 | 3,925 | 0 |
CPW Fishing Atlas, ramp layer and stocking report, retrieved October 25, 2026.
Within a short drive of Jumbo Reservoir
Further reservoirs a short haul from Jumbo Reservoir
- Jumbo Annex2 miles southwest
- Jeff's Pond20 miles southwest
- DePoorter Lake21 miles east
- North Sterling Reservoir34 miles west
- Overland Trail Park Pond35 miles southwest
Where to stay for a Jumbo Reservoir trip
- Julesburg20 miles
- Holyoke30 miles
- Sterling36 miles
Which county pages list Jumbo Reservoir
- Sedgwick Countyseat: Julesburg
- Logan Countyseat: Sterling
Piscifun reels and grips for Jumbo Reservoir
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A camera tour of the water by Jumbo Reservoir
Photo: USEPA Environmental-Protection-Agency, Public domain
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Photo: Jeffrey Beall, CC BY 3.0
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Straight answers about Jumbo Reservoir
Which CPW region covers Jumbo Reservoir?
The outline falls in Sedgwick County and Logan County, CPW Southwest Region, about 6 miles from Sedgwick.
How many acres does the CPW outline give Jumbo Reservoir?
Around 1,411 acres of water, at about 3,706 feet.
Does Jumbo Reservoir have a CPW-mapped boat ramp?
Start at Jumbo Reservoir (Julesburg) SWA near Sedgwick (north), one of 4 boat ramps.
Which fish does CPW list at Jumbo Reservoir?
Fish on the list: black bullhead, black crappie, bluegill, channel catfish, common carp, green sunfish and largemouth bass.
Are there extra rules at Jumbo Reservoir?
Trout, arctic char, grayling, salmon and whitefish (not kokanee): Daily bag 4, possession 8, in aggregate. It has its own brochure entry too, printed above.
Is a second-rod stamp needed at Jumbo Reservoir?
Colorado sells no separate trout stamp; a CPW fishing license covers trout ($44.87 for adult residents, $124.01 for nonresidents), and anglers 16 and older need one.
Are catchable trout released into Jumbo Reservoir?
Stocking report: 2 listings on the CPW catchable trout report (1 in 2026, 1 in 2025); latest May 22, 2026.
Is there a fly shop near Jumbo Reservoir?
Every shop on our Colorado list is more than 30 miles off.
Did a CPW record fish come out of Jumbo Reservoir?
Freshwater Drum, heritage length (to 2019) 32 inches in, by Keith Thompson in an unprinted year.
Is Jumbo Reservoir fished through the ice?
CPW shows ice fishing listed as yes; carry picks and test thickness.
Circle a weekend for Jumbo Reservoir
Check the bag before a fish goes on the stringer.