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Herbicide Application & Roadside Mowing
Reporting System

Herbicide Applications

Activities are recorded for Boulder County Parks & Open Space properties that are open to the public.

Start End Location Product Notes
2024/07/1807/18/20242024/07/1807/18/2024Heil Valley RanchQuinstar 4SLMorning spot treatment (before 10 AM) of leafy spurge on roadside and trails.
2024/06/0406/04/20242024/06/0406/04/2024Pella CrossingEcomazapyr 2slSpot Spraying Yellow Flag Iris
2024/06/0406/04/20242024/06/0406/04/2024Martin FBEcomazapyr 2slSpot Spraying Yellow Flag Iris
2024/06/0406/04/20242024/06/0406/04/2024ZAPFEcomazapyr 2slSpot Sparying Yellow Flag Iris
2023/10/2610/26/20232023/10/2610/26/2023Walden PondsHardball, Telar, QuinstarSpraying general weeds at Walden Ponds
2023/10/2410/24/20232023/10/2410/24/2023Coalton Trailhead - all trails leaving (Meadowlark, Mayhoffer Singletree, Coalton) Hardball, Telar, QuinstarSpraying general weeds along trails including Meadowlark and Mayhoffer Singletree trails
2023/10/2410/24/20232023/10/2410/24/2023Walden Ponds Trail and Heatherwood Walden Link Hardball, Telar, QuinStarSpraying general weeds along trails, cutting and stump treating Tamarisk around ponds
2023/10/1810/18/20232023/10/1810/18/2023Coal Creek TrailHardball,TelarSpraying general weeds along the trails. Starting at Flagg Park Trailhead and ending at 120th street.
2023/10/1710/17/20232023/10/1710/17/2023Pella Ponds - Marlette TrailsHardball, TelarSpot spraying along trails and in parking lot
2023/10/1210/12/20232023/10/1610/16/2023Heil Valley Ranch Trails: Grindstone Quarry, Lichen Loop, Overland LoopMilestone, Quinstar, Hardball & TelarSpot spraying general weeds and bindweed along the trails.
2023/10/1110/11/20232023/10/1110/11/2023Heil Valley Ranch Trails: Grindstone Quarry, Lichen Loop, Overland LoopMilestone, Quinstar, Hardball & TelarSpot spraying general weeds and bindweed along the trails.
2023/10/0510/05/20232023/10/0510/05/2023Carolyn Holmberg Preserve at Rock Creek Farm, Rock Creek Trail and Cradleboard trail.Hardball, Telar, QuinstarSpot treatments
2023/09/2809/28/20232023/09/2809/28/2023Carolyn Holmberg Preserve at Rock Creek Farm and Rock Creek TrailTelar & HardballSpraying general weeds including Teasel and Canada Thistle.
2023/09/2609/26/20232023/09/2609/26/2023Carolyn Holmberg Preserve at Rock Creek Farm and Rock Creek TrailTelar & HardballSpraying general weeds including Teasel and Canada Thistle.
2023/09/1809/18/20232023/09/1809/18/2023Heil Valley RanchMethod, TelarSpraying Leafy Spurge
2023/09/2109/21/20232023/09/2109/21/2023ClineMilestone, TelarSpraying general weeds, specifically Canada Thistle
2023/09/1309/13/20232023/09/1309/13/2023Cougar TrailEcomazapyr, ClearcastSpraying hairy willowherb
2023/09/1309/13/20232023/09/1309/13/2023Oxford Rd and 95thEcomazapyr, ClearcastSpraying hairy willowherb
2023/09/1309/13/20232023/09/1309/13/2023Heil Valley RanchEcomazapyr, Clearcastspraying along sections of creek for hairy willowherb
2023/09/1309/13/20232023/09/1309/13/2023Isabelle RdEcomazapyr, ClearcastSpraying hairy willowherb
2023/09/1309/13/20232023/09/1309/13/2023McLachlan CreekEcomazapyr, Clearcastspraying hairy willowherb
2023/09/1309/13/20232023/09/1309/13/2023Jay Rd Ecomazapyr, Clearcastspraying hairy willowherb
2023/09/1309/13/20232023/09/1309/13/2023N 63rd Road Ecomazapyr, Clearcastspraying hairy willowherb
2023/09/0509/05/20232023/09/0509/05/2023William MerlinTelarSpraying Telar for general weeds at Williams Merlin off of Peak-to-Peak Highway.
2023/08/2908/29/20232023/08/2908/29/2023Meeker Sort YardMilestoneSpraying Meadow Hawkweed at the Meeker Sort Yard and adjacent county roads.
2023/08/1008/10/20232023/08/1008/10/2023Isabelle RoadRodeo spraying for hairy willowherb on roadside
2023/08/1008/10/20232023/08/1008/10/2023Carolyn Holmberg Preserve at Rock Creek FarmRodeo Sterns Lake emergency outlet. Spraying for Hairy Willow Herb.
2023/08/1008/10/20232023/08/1008/10/2023Nelson Road & 65th StreetRodeoSpraying Hairy Willow Herb.
2023/07/3107/31/20232023/08/0308/03/2023Mud Lake, Tucker, County road 126Cimmaron 1.5 oz/ac, MSO 64 oz/ac, Hardball 24 oz/ac, Telar 1.5 oz/acSpraying for oxeye daisy, canada thistle, and yellow toadflax
2023/07/3107/31/20232023/08/0308/03/2023Caribou RanchCimmaron Plus 1.5 oz/ac, MSO 64 oz/ac, Harball 24 oz/ac, Telar 1.5 oz/ac Treating along riparian corridor as well as meadow and Sherwood gulch for oxeye daisy, yellow toadflax, and canada thistle
2023/07/2707/27/20232023/07/2707/27/2023Nederland Community Sort Yard Cimarron Plus
2023/07/2707/27/20232023/07/2707/27/2023RogersCimarron Plus
2023/07/2507/25/20232023/07/2507/25/2023CR 97 and Caribou RdMilestoneSpot spraying for orange hawkweed
2023/07/2507/25/20232023/07/2507/25/2023Renalds RuthMilestoneSpraying orange hawkweed
2023/07/2607/26/20232023/07/2607/26/2023Nelson RoadRodeo and SunwetSpraying Hairy Willowherb.
2023/07/1807/18/20232023/07/1807/18/2023Mud LakeCimarron Plus & MSOSpraying for Oxeye Daisy and Yellow Toadflax. Will be working along county road 126.
2023/07/1807/18/20232023/07/1807/18/2023Schimdt TrustQuinstar & MSO, Cimarron plus & MSOSpraying for Leafy Spurge and Yellow Toadflax.
2023/07/1907/19/20232023/07/1907/19/2023Open Sky Loop Lagerman Agricultural PreserveRodeo and SunwetSpraying for Hairy Willlowherb.
2023/07/1207/12/20232023/07/1207/12/2023Carolyn Holmberg Preserve at Rock Creek FarmsRodeoTreatment of lake dam spill way for safety.
2023/07/1107/11/20232023/07/1107/11/2023Somerset TrailWeedmaster and MSO [64 oz/acre]7:00 am - 4:00 pm. Applications will be conducted along the edges of the trail. Spraying general weeds.
2023/06/2906/29/20232023/06/2906/29/2023Jasper Rd.Rodeo Treating for Hairy Willowherb
2023/06/2906/29/20232023/06/2906/29/2023Nelson Rd.Rodeo Treating Hairy-willow herb
2023/06/2706/27/20232023/06/2706/27/2023Boulder Canyon TrailWeedmaster, RodeoSpraying various general weed patches and clearing poison ivy from trail
2023/06/2006/20/20232023/06/2006/20/2023Tommy thompsonVista hardball sulfentrazone dicamba
2023/06/1406/14/20232023/06/1406/14/2023Mayhouffer Telar hardball
2023/06/1406/14/20232023/06/1406/14/2023Monarch parkTelar hardball
2023/06/1406/14/20232023/06/1406/14/2023Walden pondsEcomazapyr, Clearcast, RodeoSpot spraying for yellow flag iris
2023/06/0806/08/20232023/06/0806/08/2023Niwot trailQuinstarSpraying for leafy spurge
2023/06/1406/14/20232023/06/1406/14/2023Pella PondsEcomazapyr, Clearcast, RodeoSpraying for Yellow flag Iris
2023/06/0706/07/20232023/06/0706/07/2023Heil Valley Ranch2,4-D, Dicamba, ChlorsulfuronTreatment of Curly Dock will take place in the meadow and along trail edges North of the lower parking lot.
2023/06/0806/08/20232023/06/0806/08/2023Walden Ponds/Duck PondEcomazaypyr/Clear CastSpot spraying Cattails for access purposes. Treatment will be done before 12 PM.
2023/06/0206/02/20232023/06/0206/02/2023Heil Valley Ranch2,4-D, Dicamba, ChlorsulfuronTreatment of Curly Dock will take place in the meadow South of the lower parking lot and along the roadsides of Geer Canyon Dr.
2023/05/3005/30/20232023/05/3005/30/2023Monarch Telar vista hardball
2023/05/2605/26/20232023/05/2605/26/2023Heil Valley Ranch2,4-D, Dicamba, ChlorsulfuronTreatment of Curly Dock will take place in the meadow North of the lower parking lot and along the roadsides of Geer Canyon Dr.
2023/05/2505/25/20232023/05/2505/25/2023Tommy thompsonTelar vista dicamba
2023/05/2305/23/20232023/05/2305/23/2023KraftQuinstarLeafy spurge work on property. Work will wrap up by noon.
2023/05/2505/25/20232023/05/2505/25/2023Longmont Boulder Trail and local connectionsWeedmaster, Sulfentrazone7:00 am - 4:00 pm. Applications will be conducted along the edges of the trail. Application will start at the crossroads of the Diagonal Hwy and 83rd Street, and end at Lookout Rd and 71st Street. Local connections are the Niwot Trail system, including Cougar Trail and 95th Street.
2023/05/2205/22/20232023/05/2205/22/2023Heil Valley Ranch QuinstarSpot applications for leafy spurge near schoolhouse and lichen loop trails. Morning application.
2023/05/1705/17/20232023/05/1705/17/2023Tommy Thompson TelarCurly dock control
2023/05/0105/01/20232023/05/0105/01/2023Heil- Schoolhouse LoopWeedmasterMorning application until noon, along trails
2022/12/1212/12/20222022/12/1212/12/2022Dodd Reservoir, Monarch Park, Bald MountainPlainviewBare ground application in and around parking lots
2022/12/0812/08/20222022/12/0812/08/2022Lagerman Reservoir, Monarch ParkPlainviewBare ground application in and around parking lots
2022/12/0712/07/20222022/12/0712/07/2022Heil Valley Ranch, Dodd Reservoir, Lagerman ReservoirPlainviewBare ground work in and around parking-lots, walking paths.
2022/12/0612/06/20222022/12/0612/06/2022Heil Valley Ranch, Altona School HousePlainviewBareground work in and around parking-lot and walking paths.
2022/11/0711/07/20222022/11/0711/07/2022Walden Ponds Glyphosate We will be doing tree removal within the Critical Wildlife Habitat
2022/11/0211/02/20222022/11/0211/02/2022Walden Ponds Milestone, Quinstar, Rejuvra This treatment will be along the trails
2022/11/0111/01/20222022/11/0111/01/2022Hall RanchRejuvraAerial application - park closed
2022/10/2610/26/20222022/10/2610/26/2022Twin Lakes Milestone, Rejuvra Spray along trail edges
2022/10/2610/26/20222022/10/2610/26/2022Harney Lastoka TrailMilestone, Rejuvra Treatment will be along trail edges.
2022/10/1810/18/20222022/10/2010/20/2022Heil Valley RanchMilestone, RejuvraPicture Rock, Wapiti, Wild Turkey, Ponderosa Loop and Lichen Loop Trails
2022/10/1710/17/20222022/10/1810/18/2022Heil - Pyrite trail Milestone Afternoon treatment. Includes the edges of trails
2022/10/1110/11/20222022/10/1310/13/2022Walker Ranch - Meyers Homestead Trail, Walker Loop, Josie Heath TrailMilestone, Quinstar, Rejuvra This treatment will occur along all trails and in trailhead parking lots.
2022/10/2610/26/20222022/10/2610/26/2022Walden Ponds Milestone, Rejuvra This treatment will occur along trail edges and in parking lots.
2022/10/1010/10/20222022/10/1010/10/2022Heil Valley Ranch Milestone, Quinstar This treatment will be done near the corral parking lot and along the road
2022/10/0410/04/20222022/10/0410/04/2022Walden Ponds Milestone, Quinstar, Rejuvra, Rodeo, Ecoimzapyr This application will occur along the trail edges and in the open areas.
2022/10/0310/03/20222022/10/0310/03/2022Bettasso Preserve - Betasso Link trail and Canyon Loop Rejuvra
2022/09/2009/20/20222022/09/2009/20/2022Caribou Ranch & Mud Lake - all trails (Kinnickinnick Loop, Tungsten Loop, Caribou Ranch Link, Blue Bird Loop, DeLonde TrailMilestone
2022/09/1509/15/20222022/09/1509/15/2022Caribou Ranch & Mud Lake - all trails (Kinnickinnick Loop, Tungsten Loop, Caribou Ranch Link, Blue Bird Loop, DeLonde Trail)Milestone, EcomazpryWork will be done in meadows and along trail edges.
2022/09/1409/14/20222022/09/1409/14/2022Pella Ponds - Trailhead, Marlette Trails and Braly Trails Hardball, Telar, Rodeo, Ecoimazpyr Most of the treatment will be along the pond banks. Some work will be along the trails. Please use caution and watch for employees. All day 7:00am-4:30pm
2022/09/1309/13/20222022/09/1409/14/2022Coalton Trailhead - all trails leaving (Meadowlark, Mayhoffer Singletree, Coalton) trailheadHardball, Telar, RejuvraTrail work - please use caution and watch for employees on trail. All day work 8:30-4:00.
2022/09/1309/13/20222022/09/1309/13/2022Rock Creek FarmsHardball, Telar, RejuvraWe will be working in the drainages on the property. Some work will be near the craddleboard trail but not on the trail. 8:30-2:00.
2022/09/0809/08/20222022/09/0809/08/2022Caribou Ranch - Large Meadow near Delonde Homestead and along Delonde TrailMilestone, EcomazpryThis treatment will be in the afternoon 12:00-3:30.
2022/08/2308/23/20222022/08/2308/23/20224 Mile Canyon, Sunshine Canyon, Dixon Rd., Gold Trail Rd.Rejuvra, MilestoneSpot spraying for cheat grass and spotted knapweed
2022/08/1808/18/20222022/08/1808/18/2022Pella Ponds - Marlette TrailsRodeo, EcomazyprSpot treating along pond banks for Hairy Willowherb. Done by 11:00 am.
2022/08/1708/17/20222022/08/1708/17/2022Anne U. White Trail and TrailheadRoundup ProSpot treating along trail in the morning. Done before 12:00 pm.
2022/08/1008/10/20222022/08/1008/10/2022Sterns lake trailhead, Mary Miller Trail, Craddleboard trailTelar, Hardball, Milestone, Rejuvra, Quinstar Trail Work. Caution when using trail.
2022/08/0308/03/20222022/08/0308/03/2022Cougar TrailRodeo, Ecomazypr8:00 am - 11:30 am. Spot treating for Purple Loosestrife in the area.
2022/07/2607/26/20222022/07/2607/26/2022Caribou Ranch - Large Meadow near Delonde Homestead Cimarron Plus Application will be occurring in the afternoon. After 12:30 pm. Application will not be along trails.
2022/07/2107/21/20222022/07/2107/21/2022Bettasso Preserve - Betasso Link trail and Canyon Loop Hardball, MilestoneTreatment will be done in the morning and finish before 1:00 pm
2022/07/1307/13/20222022/07/1307/13/2022Caribou RanchCimarron Plus
2022/07/0707/07/20222022/07/0707/07/2022Longmont-Boulder TrailTelar, Hardball, MilestoneThis application will take place between 8:00 AM and 11:00 AM.
2022/07/0507/05/20222022/07/0507/05/2022Arapahoe Rd., Jasper Rd., Hwy. 287Overdrive, Quinstar, MSOtargeting leafy spurge
2022/06/3006/30/20222022/06/3006/30/2022Dixon Rd., County Rd. 52, 4-Mile Canyon Quinclorac, Overdrive, MSOleafy spurge control
2022/06/2906/29/20222022/06/2906/29/2022Quicksilver Rd., Oxford Rd., E. County Line Rd., Niwot Rd.Telar XP, MilestoneCanada thistle, diffuse knapweed and chickory spot spraying
2022/06/1406/14/20222022/06/1406/14/2022Pella Ponds, Sterns Lake, Dodd Reservoir, Gaynor LakeRodeo, ecoimazpyrSpillway treatment
2022/06/0906/09/20222022/06/0906/09/2022Longmont-Boulder TrailVista, Telar, Sulfentrazone, Hardball, Milestone7:30 am -12:30 pm from Lefthand Grange to Monarch
2022/06/0806/08/20222022/06/0806/08/2022Walker Range - All trailheads and trailsMilestone and QuinstarSpot spraying around trailhead and trails.
2022/06/0706/07/20222022/06/0706/07/2022Mayhoffer, Meadowlark TrailMilestone, Hardball, NISMost spot spraying will be done off of the trail.
2022/05/3105/31/20222022/05/3105/31/2022Longmont Boulder Trail Vista, Sulfentrazone Trail between 95th and Left Hand Grange, only afternoon spraying
2022/05/2605/26/20222022/05/2605/26/202255th St., 63rd St. Harball, Piperroadside spot spraying
2022/05/2505/25/20222022/05/2505/25/2022Hwy 52piper, Hardball
2022/05/2505/25/20222022/05/2505/25/2022Longmont Boulder TrailVista, Sulfentrazone, PiperAfternoon; work done between 95th and lefthand grange.
2022/05/1905/19/20222022/05/1905/19/2022Walker Ranch - Meyers Homestead Trail, Walker Loop, Josie Heath TrailHardball, Weedmaster, Milestone, Rejuvra This treatment will happen at the trailheads and along the trails. Spot spraying.
2022/05/1905/19/20222022/05/1905/19/2022Pella Ponds - Marlette TrailsHardball, WeedmasterWill be done by 10:30 am.
2022/05/1705/17/20222022/05/1705/17/2022Pella PondsHardball, Telar, Dicambaspot spraying
2022/05/1705/17/20222022/05/1705/17/2022CDOT HWY. 52, 55th St.Hardball, Piper roadside spot spraying
2022/05/1605/16/20222022/05/1605/16/2022Oxford Rd., 119th St., Quicksilver Rd., Pipit Rd. Hardball, Piper roadside spot spraying
2022/05/1005/10/20222022/05/1005/10/2022Pella Ponds - Trailhead, Marlette Trails and Braly Trails Hardball, Telar, Quinstar, Piper, VistaThis will be a spot treatment along the trail edges and parking lot
2022/05/0505/05/20222022/05/0505/05/202275th St., 95th St., Niwot Rd.Plainview SC; Piper; Roundup Pro Concentratebare-ground application under guardrails
2022/04/2804/28/20222022/04/2804/28/202295th St.; 75th St.; Niwot Rd.Plainview SC; Piper; Roundup Pro Concentratebare-ground application under guardrails
2022/04/2704/27/20222022/04/2704/27/2022Nelson Road; Niwot Road; 63rd StreetPlainview SC; Piper; Roundup Pro ConcentrateBare-ground application under guardrails
2022/04/2604/26/20222022/04/2604/26/202295th St., 75th St.Piper, Hardballspot spraying, mainly targeting Kochia and Curly Dock

Mowing Reports

Mowing activities are recorded for Boulder County county maintained roads.

Start End Location Notes