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Montana · Fishing
Roundup sits in the middle of Musselshell County, and while it's not a town most anglers put at the top of their list, it has a small but workable set of fishing spots that reward people willing to do a little homework.
3 spotsUpdated dailyFree to access
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Roundup sits in the middle of Musselshell County, and while it's not a town most anglers put at the top of their list, it has a small but workable set of fishing spots that reward people willing to do a little homework. Lake Mason is the most substantial option, a reservoir that holds warmwater species and draws locals year-round. Devils Hole Lake is a smaller, quieter lake that tends to get overlooked, which can work in your favor if you want water to yourself. Asparagus Point Recreation Site puts you on the Musselshell River, where river fishing adds a different dynamic than the two lakes — reading current, working structure, and dealing with flows that change seasonally. None of these spots require a long hike or technical access, so the barrier to entry is low. That said, Roundup fishing is firmly in the category of local-knowledge water rather than destination fishing. If you're already in the area, all three are worth your time. If you're driving hours specifically to fish, set realistic expectations and plan to cover more than one spot.
Both are warmwater lakes, so you're primarily looking at species like walleye, perch, and bass depending on what Montana Fish, Wildlife and Parks has stocked or what has naturally established there. Check the current FWP stocking reports for Lake Mason specifically before your trip, as stocking schedules and species vary by year.
Asparagus Point gives you access to the Musselshell River, which is a prairie river — expect slower, warmer water than a mountain stream, with species like sauger, northern pike, and catfish more likely than trout. River levels can drop significantly in late summer, so spring and early summer generally offer better conditions and more active fish.
Crystal Lake Cabin
~1h 16m drive
A worthwhile stop near MT.
Crystal Lake Group Campsite
~1h 16m drive
A worthwhile stop near MT.
Lake Mason
~3 min drive
A worthwhile stop near MT.
Devils Hole Lake
~29 min drive
A worthwhile stop near MT.
Asparagus Point Recreation Site
~30 min drive
A worthwhile stop near MT.
Payola Reservoir
~1h 9m drive
A worthwhile stop near MT.
Dallmann Lake
~1h 24m drive
A worthwhile stop near MT.
Yes, a valid Montana fishing license is required at all three locations. You can purchase one online through the Montana FWP website, at sporting goods stores, or at many local retailers in Roundup. Non-residents pay a higher fee, so factor that into your trip budget.
For the lakes, early morning and the hour before sunset are consistently the most productive windows, especially in summer when midday heat pushes fish deeper. At Asparagus Point on the river, early morning works well, but overcast days can extend feeding activity throughout the day.
Yes, all three spots have relatively easy access without technical terrain, making them reasonable choices for beginners or families. Lake Mason in particular has enough shoreline to fish from land without a boat, which lowers the gear requirements considerably. Just bring sun protection — this part of Montana gets exposed and hot in summer.
