Question 1

What is the current water temperature at Gross Reservoir?

Accepted Answer

The current water temperature at Gross Reservoir is 53°F as of March 1, 1786. This temperature reading is based on our advanced satellite monitoring system and current data collection. Water temperature is a crucial factor for fishing success and water activities.

Question 2

How often is the Gross Reservoir water temperature updated?

Accepted Answer

Water temperature data for Gross Reservoir is updated daily through our satellite monitoring system. The last update was made on March 1, 1786. We use advanced thermal imaging and surface monitoring technology to provide accurate temperature readings.

Question 3

What activities are suitable for the current water temperature at Gross Reservoir?

Accepted Answer

With the current water temperature of 53°F at Gross Reservoir, conditions are suitable for fishing and boating activities. The temperature typically fluctuates 2-3 degrees throughout the day. This data is monitored via satellite and updated regularly to help you plan your lake activities.

Question 4

How good is the fishing at Gross Reservoir with the current water temperature?

Accepted Answer

The current water temperature of 53°F at Gross Reservoir is ideal for catching Rainbow trout, Brown trout, Lake trout. These species are typically most active at this temperature range. For best results, fish during early morning or late evening hours when fish are most active. Always check local fishing regulations and licenses before fishing.

Question 5

What is Gross Reservoir and what activities are available?

Accepted Answer

Gross Reservoir in Boulder County covers approximately 440 acres and sits at an elevation of about 7,290 ft (2,222 m).  The reservoir is owned and operated by Denver Water and receives inflow from South Boulder Creek.  Its shoreline and surrounding terrain offer a mixture of steep slopes, rocky banks, and scenic mountain views, creating a distinctive high-forested reservoir setting.

The fishery at Gross Reservoir supports a wide variety of species. Stocked and native species include rainbow trout, brown trout, lake trout, kokanee salmon, tiger muskie, splake and other trout hybrids.  The tiger muskie stocking is part of a management strategy to help control abundant sucker populations in the lake.  Anglers report catches of cutbow (a trout hybrid) among other species as well.  Fishing pressure at the reservoir is moderate, and ease of access is described as medium&mdash;shoreline access is available but the terrain and water?edge slopes can make some spots challenging.

Boating on Gross Reservoir is restricted to non-motorized craft (canoes, kayaks, rowboats) and car-top launch only trailered motorized boats are not permitted, helping keep the setting quieter and more focused on angling or paddling.  While ice?fishing is mentioned in some older sources, official use and access in winter may be limited or subject to seasonal conditions; check appropriate regulations if considering winter use.  For families, the site offers a relatively accessible outdoor experience with the day-use recreation and natural beauty of the reservoir setting, though anglers should be prepared for some hillside terrain and variable access points.

Overall, Gross Reservoir blends natural mountain reservoir character with a diverse cold?water fishery and moderate recreational amenities. It provides a solid destination for anglers seeking rainbow and brown trout, the occasional kokanee or lake trout, and even the possibility of catching larger predatory species like tiger muskie in a scenic Colorado setting.

Question 6

How big and deep is Gross Reservoir?

Accepted Answer

Gross Reservoir is a substantial body of water covering 440.00 acres (0.69 square miles) with a maximum depth of 0.00 meters (0 feet). This size and depth make it ideal for various activities including and water recreation.

Question 7

What are the current conditions at Gross Reservoir?

Accepted Answer

Current conditions at Gross Reservoir as of May 19, 2026:
      Water temperature is 53°F, 
      weather is Snow, 
      and water clarity is typical for the season. 
      These conditions are regularly updated to help you plan your visit.

Question 8

When is the best time to fish at Gross Reservoir?

Accepted Answer

The best fishing times at Gross Reservoir vary by season:
      Spring (March-May): Spring fishing at the lake is excellent for Rainbow trout, Brown trout, Lake trout, Tiger muskie. Focus on shallow areas warming up first, and use light tackle as fish become more active after winter.
      Summer (June-August): During summer months, fish are most active early morning and late evening. Look for Rainbow trout, Brown trout, Lake trout, Tiger muskie in deeper, cooler waters during mid-day.
      Fall (September-November): Fall brings excellent fishing opportunities as Rainbow trout, Brown trout, Lake trout, Tiger muskie feed heavily before winter. Focus on areas with falling water temperatures.
      Winter (December-February): Ice fishing is popular during winter months. Target Rainbow trout, Brown trout, Lake trout, Tiger muskie in shallower bays and near structure, always ensuring safe ice conditions.
      Additionally, early morning and late evening typically offer the best fishing conditions.

Question 9

What facilities and access points are available at Gross Reservoir?

Accepted Answer

Gross Reservoir offers the following facilities and amenities:

Please note that some facilities may have seasonal hours or closures. Check current conditions and regulations before your visit.

Question 10

What types of fish can I catch at Gross Reservoir?

Accepted Answer

Gross Reservoir is home to Rainbow trout, Brown trout, Lake trout, Tiger muskie. Each species has specific patterns and preferences that can help you plan your fishing trip effectively.

Question 11

What are the best techniques and times to catch Rainbow trout at Gross Reservoir?

Accepted Answer

For Rainbow trout at Gross Reservoir:
- Best seasons: Spring, Fall
- Active times: Morning, Late afternoon
- Preferred water temperature: 50-60°F
- Typical depth: 3-9 feet in spring, deeper in summer
- Habitat: Streams, Rivers, Lakes
- Spawning season: Spring

Recommended techniques:
- Fishing methods: Fly fishing, Spincasting
- Effective lures: Small spinners, Spoons, Fly patterns
- Natural bait options: Worms, Salmon eggs, Insects

Tackle recommendations:
- Rod: Ultralight to light power rod
- Reel: Spinning or fly reel
- Line: 2-6 lb test

Question 12

What are the best techniques and times to catch Brown trout at Gross Reservoir?

Accepted Answer

For Brown trout at Gross Reservoir:
- Best seasons: Spring, Fall
- Active times: Dawn, Dusk, Night
- Preferred water temperature: 50-65°F
- Typical depth: 2-10 feet in streams, deeper in lakes
- Habitat: Streams, Rivers, Lakes
- Spawning season: Fall

Recommended techniques:
- Fishing methods: Fly fishing, Spincasting, Trolling in lakes
- Effective lures: Streamers, Spoons, Spinners
- Natural bait options: Worms, Crickets, Grasshoppers

Tackle recommendations:
- Rod: Light to medium power rod
- Reel: Spinning or fly reel
- Line: 4-8 lb test

Question 13

What are the best techniques and times to catch Lake trout at Gross Reservoir?

Accepted Answer

For Lake trout at Gross Reservoir:
- Best seasons: Spring, Fall
- Active times: Morning, Evening
- Preferred water temperature: 40-55°F
- Typical depth: 20-60 feet, even deeper in summer
- Habitat: Deep, cold lakes
- Spawning season: Fall

Recommended techniques:
- Fishing methods: Jigging, Trolling
- Effective lures: Heavy spoons, Jigs, Deep running plugs
- Natural bait options: Minnows

Tackle recommendations:
- Rod: Medium-heavy to heavy power rod
- Reel: Baitcasting reel
- Line: 10-20 lb test

Question 14

What are the best techniques and times to catch Tiger muskie at Gross Reservoir?

Accepted Answer

For Tiger muskie at Gross Reservoir:
- Best seasons: Spring, Fall
- Active times: Morning, Late afternoon
- Preferred water temperature: 55-72°F
- Typical depth: 5-15 feet in spring, 10-25 feet in summer
- Habitat: Lakes, Rivers
- Spawning season: Late Spring

Recommended techniques:
- Fishing methods: Casting, Trolling
- Effective lures: Large spinners, Crankbaits, Jerkbaits
- Natural bait options: None, due to their aggressive nature

Tackle recommendations:
- Rod: Heavy power rod
- Reel: Baitcasting reel
- Line: 30-50 lb test

Question 15

What are the best fishing seasons at Gross Reservoir?

Accepted Answer

Spring: Best for catching Rainbow trout, Brown trout, Lake trout, Tiger muskie

Fall: Best for catching Rainbow trout, Brown trout, Lake trout, Tiger muskie

Question 16

What water recreation activities are available at Gross Reservoir?

Accepted Answer

Gross Reservoir offers various recreational opportunities including:
      - Fishing

Additional lake information:
      - Lake size: 440.00 acres (0.69 square miles)
      - Maximum depth: 0.00 meters

The lake is particularly suitable for fishing and boating 
      during current conditions. Always check weather forecasts and local regulations before activities.

Question 17

What's the best time to visit Gross Reservoir, and how's the weather?

Accepted Answer

The best time to visit Gross Reservoir depends on your planned activities:
      - Summer (June-August): Ideal for swimming, boating, and water sports
      - Spring/Fall: Excellent fishing and fewer crowds
      - Winter: Ice fishing when conditions permit
      Current weather is Snow. 
      Check our current updates for water temperature and conditions before your visit.

Question 18

What permits and regulations should I know about for Gross Reservoir?

Accepted Answer

For Gross Reservoir, you should be aware of:
      - Fishing license requirements (check state regulations)
      - Boat registration requirements

For specific requirements and current regulations:
      
      - Contact local authorities
      - Visit the DNR website
      - Visit official websites listed below

Question 19

Where can I find more information about Gross Reservoir?

Accepted Answer

You can find detailed information about Gross Reservoir through these official resources:
        
        - Additional Information
        
        These resources provide up-to-date information about:
        
        - Current lake conditions
        - Facility hours and availability
        - Special notices and alerts
        
        - Seasonal updates and events
        
        Official websites: https://ndismaps.nrel.colostate.edu/index.html?app=FishingAtlas&keyword=fspot&value=397

Question 20

What is the water temperature at Gross Reservoir in January?

Accepted Answer

In January, the water temperature at Gross Reservoir is approximately 34.80°F. 
        This information helps in planning activities like water activities.

Question 21

What is the water temperature at Gross Reservoir in February?

Accepted Answer

In February, the water temperature at Gross Reservoir is approximately 34.86°F. 
        This information helps in planning activities like water activities.

Question 22

What is the water temperature at Gross Reservoir in March?

Accepted Answer

In March, the water temperature at Gross Reservoir is approximately 37.86°F. 
        This information helps in planning activities like water activities.

Question 23

What is the water temperature at Gross Reservoir in April?

Accepted Answer

In April, the water temperature at Gross Reservoir is approximately 45.07°F. 
        This information helps in planning activities like water activities.

Question 24

What is the water temperature at Gross Reservoir in May?

Accepted Answer

In May, the water temperature at Gross Reservoir is approximately 53.36°F. 
        This information helps in planning activities like water activities.

Question 25

What is the water temperature at Gross Reservoir in June?

Accepted Answer

In June, the water temperature at Gross Reservoir is approximately 54.86°F. 
        This information helps in planning activities like water activities.

Question 26

What is the water temperature at Gross Reservoir in July?

Accepted Answer

In July, the water temperature at Gross Reservoir is approximately 72.00°F. 
        This information helps in planning activities like water activities.

Question 27

What is the water temperature at Gross Reservoir in August?

Accepted Answer

In August, the water temperature at Gross Reservoir is approximately 67.21°F. 
        This information helps in planning activities like water activities.

Question 28

What is the water temperature at Gross Reservoir in September?

Accepted Answer

In September, the water temperature at Gross Reservoir is approximately 65.79°F. 
        This information helps in planning activities like water activities.

Question 29

What is the water temperature at Gross Reservoir in October?

Accepted Answer

In October, the water temperature at Gross Reservoir is approximately 56.29°F. 
        This information helps in planning activities like water activities.

Question 30

What is the water temperature at Gross Reservoir in November?

Accepted Answer

In November, the water temperature at Gross Reservoir is approximately 48.57°F. 
        This information helps in planning activities like water activities.

Question 31

What is the water temperature at Gross Reservoir in December?

Accepted Answer

In December, the water temperature at Gross Reservoir is approximately 39.14°F. 
        This information helps in planning activities like water activities.

Question 32

What are the current fishing conditions at Gross Reservoir?

Accepted Answer

Current water temperature at Gross Reservoir is 53°F. 
        These conditions are ideal for catching Rainbow trout, Brown trout, Lake trout.

Question 33

What is the maximum depth of Gross Reservoir?

Accepted Answer

Gross Reservoir has a maximum depth of 0.00 meters (0 feet). This depth provides excellent habitat for various fish species and supports diverse aquatic life. The lake's depth profile makes it suitable for both shallow-water fishing and deep-water activities.

Question 34

How big is Gross Reservoir?

Accepted Answer

Gross Reservoir covers an area of 440.00 acres (0.69 square miles) at full pool. The lake is currently holding 318.78 acres of water, which represents 72.4% of its total capacity. This substantial size makes it an important recreational resource for Boulder County, offering extensive opportunities for fishing, boating, and other water activities.

Question 35

Where is Gross Reservoir located?

Accepted Answer

Gross Reservoir is located in Crescent, Boulder County, CO. The lake is accessible to the public and serves as a popular destination for outdoor activities. Its location in Boulder County makes it easily accessible from Crescent and surrounding communities.

Question 36

What is the current water level at Gross Reservoir?

Accepted Answer

Gross Reservoir is currently holding 318.78 acres of water, compared to its full capacity of 440.00 acres. This represents 72.4% of its total capacity. Water levels are good for most recreational activities. These water levels are monitored regularly and impact various recreational activities on the lake.

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