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Satellite view of Union Reservoir Nature Area

Union Reservoir Nature Area

Park · Longmont, Colorado

Hot — visit earlyBarbecue grillPicnic tablesPublic restroomVolleyball court

Recreation spot offering picnicking, fishing & a dog beach, plus a sailing club with weekly racing.

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Weather at Union Reservoir Nature Area

H: 98° L: 58°
Sunny
Sunny
92°
|
Feels like 83°
Precipitation
1%
Humidity
18%
Wind
14 mph
UV Index
2.4
Water Conditions:
🏊Perfect for swimming
12 AM
Clear
68°
3 AM
Clear
65°
6 AM
Clear
58°
9 AM
Sunny
72°
12 PM
Sunny
93°
3 PM
Sunny
94°
6 PM
Sunny
90°
9 PM
Clear
80°

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Frequently asked questions

Where is Union Reservoir Nature Area?
Union Reservoir Nature Area is a park in Longmont, Colorado.
Can you swim at Union Reservoir Nature Area?
There is no fixed answer for Union Reservoir Nature Area: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Union Reservoir Nature Area in Longmont, Colorado. Check current water conditions before you go, and follow posted signs and local guidance.
How is Union Reservoir Nature Area rated?
Union Reservoir Nature Area in Longmont, Colorado has an average visitor rating of 4.6 out of 5, based on 764 reviews.

Visitor Reviews

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Been here? A quick note helps the next visitor plan their day. Handy things to mention:

Water temperatureCrowds & parkingBest time to goSafety & access

Best Times to Visit

☀️
Right Now
Very warm - visit early morning or evening
General Tips:
  • Weekday mornings (8–10 AM) are typically less crowded
  • Check the forecast 2–3 days ahead for best planning
  • Avoid holiday weekends for a quieter experience
Best Seasons:
☀️ Summer (Jun-Aug)🍂 Fall (Sep-Nov)🌸 Spring (Mar-May)

Location & Contact

461 Co Rd 26, Longmont, CO 80504

Longmont, Colorado 80504

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Highlights

Picnics

Accessibility

Wheelchair accessible parking lot

Amenities

🍖 Barbecue grill🧺 Picnic tables🚻 Public restroom🏪 Swings🏐 Volleyball court

Family & Children

👶 Good for kids👶 Playground