On paper Bystre Lake sits in the Upper Withlacoochee basin, but no named creek runs in or out — every mapped flowline around the lake is unnamed, and no source names an inflow or outflow. What is documented is the overflow: in August 2018 a full lake left its basin overland, flooding the pastures along Mondon Hill Road. Treat it as a single pool with no route anywhere.
Bystre Lake has no gauge, no published stage record and no adopted minimum level — the only dated water-level event on record is the flood of August 16, 2018, when the Hernando Sun reported the lake overflowing "once again" into the pastures along Mondon Hill Road. The 2026 season sits at the opposite extreme: SWFWMD extended a Modified Phase III "Extreme" water shortage through October 1, 2026 covering Hernando County, citing an 11.4-inch May rainfall deficit. Surface area is about 217 acres by two mapped datasets that agree within an acre, though the wetted area at high stage runs larger. FDEP lists chlorophyll-a as impaired here, so the conditions for algal blooms are present; no dated bloom or fish kill is on record.
Plain English Summary
| Water quality classification | FDEP classifies Bystre Lake (WBID 1329W) as Class III Fresh Waters, CLASS = 3F — the designation for recreation and for the propagation and maintenance of a healthy, well-balanced population of fish and wildlife. It is the standard the lake is assessed against, and it does not by itself restrict what a visitor may do here. |
| Eating what you catch | The Florida Department of Health's mercury advisory is the rule most likely to change your behaviour at this lake. Largemouth bass: one meal per month for women of childbearing age and young children, one per week for everyone else. Bluegill: two per week for both groups. Blue tilapia: two per week for both groups. Source is FDOH's "Your Guide To Eating Fish Caught In Florida," June 2021 v2, which is the printable advisory FDOH's current fish advisories page links. FDEP corroborates it: its Cycle 6 assessment of WBID 1329W lists parameter "Mercury (in fish tissue)", assessment category 4a, status "TMDL Complete", with the comment in full — "This waterbody has sufficient data to meet Planning List requirements and there is a DOH fish consumption advisory. This parameter will remain in category 4a because there is a DEP adopted mercury TMDL." |
| Fishing licence and limits | Statewide Florida freshwater fishing licence and statewide bag and size limits apply. We found no lake-specific FWC regulation, no Fish Management Area designation and no special bass rule for Bystre Lake in FWC's Southwest region freshwater sites-and-forecasts index (11 sites listed, none in Hernando County) or on any FWC lake page — we found no FWC page for this lake at all. |
| Motors, horsepower and no-wake | We found no horsepower cap, electric-only rule, gas-motor ban or posted no-wake zone for Bystre Lake in FWC's inventory row (no restriction field populated), Hernando County's Waterways Division boating-resources page, the county's 2020 Boat Ramp Master Plan, the county sitemap, or the chapter index of Florida Administrative Code Chapter 68D-24 (Boating Restricted Areas), which carries no Hernando County section and no rule naming Bystre Lake. We did not read the text of every 68D-24 section and we did not review Hernando County's codified ordinances (Municode Chapter 7, Boats and Waterways). This is a not-found in the sources searched, not a determination that the lake is unrestricted. |
| Hours | FWC's inventory row records Hours "Sunrise to Sunset" for ramp HD00001AA, attributed to Hernando County. No Hernando County page confirms it — the county publishes no page for this ramp. |
| Drought restrictions | SWFWMD's Modified Phase III "Extreme" Water Shortage applies to Hernando County through October 1, 2026: one watering day per week by address, within narrow permitted hours. These are irrigation restrictions. They do not restrict boating or launching. |
| Full legal text | Official boating regulations → |
Can I actually launch a boat at Bystre Lake?
Is there a fee at the Bystre Lake boat ramp?
Are there restrooms at the Bystre Lake ramp?
Is it safe to eat fish from Bystre Lake?
How big and how deep is Bystre Lake?
Does Bystre Lake flood?
Bystre Lake is a quiet, roughly 217-acre water in the rolling country about four miles east-southeast of Brooksville, and its clearest paper trail is a bad one: FDEP lists it impaired five ways — nitrogen, phosphorus, chlorophyll-a and the aquatic community itself, plus mercury in fish tissue under an adopted TMDL. The known fish list is three species long and comes from the health department's mercury sampling rather than a fisheries survey: largemouth bass, bluegill and blue tilapia, all under a standing consumption advisory. When the lake fills it has left its basin entirely, flooding the surrounding pastures in 2018.
Access is one gravel-and-sand lane at the end of 7399 Clayton Road — six trailer spaces on grass, no dock, no toilet, no fee, and no sign anyone is minding the place. Hernando County's own list of maintained boat ramps does not name this one, no closure is posted either, and the county's 2020 ramp master plan deferred its freshwater facilities without ever assessing this ramp. Ring Hernando County Waterways Services at 352-754-4742 before you drive out with a boat, and navigate by address — county minutes record that road signage was still missing as of 2022.