Gross Reservoir trout stocking
Boulder County, Colorado · lake · 7,262 ft elevation
Gross Reservoir was last stocked 121 months ago (Oct 25 to 31, 2016). We have 2 stockings on record since Sep 22, 2015.
- Number 12 of 17 stocked waters in Boulder County by stocking days.
- Stocked less often than most Colorado waters on our record.
River conditions
Nearest USGS gage: SOUTH BOULDER CR AT FOREBAY NR ELDORADO SPRINGS CO (5 km away, on a different stream or lake).
- Water temperature
- 57°F
Ideal for trout. Prime range for trout (about 50 to 65°F): fish are feeding actively.
Latest reading Sep 29, 2026, 1:00 AM UTC. USGS data are provisional. Gage page at USGS.
Weather at Gross Reservoir
- Tonight50°FRain Showers Likely60% rain · wind 3 mph
- Tuesday60°FChance Rain Showers39% rain · wind 5 mph
- Tuesday Night50°FRain Showers Likely66% rain · wind 3 mph
- Wednesday57°FRain Showers Likely65% rain · wind 5 to 9 mph
- Wednesday Night46°FRain Showers Likely58% rain · wind 7 mph
- Thursday58°FChance Rain Showers then Mostly Sunny46% rain · wind 6 mph
Forecast from the National Weather Service for this location, refreshed hourly.
Stocking history
20161 stocking
| Date | Species | Since previous |
|---|---|---|
Week of Oct 25Latest Oct 25 to Oct 31 | Trout | 57 weeks |
20151 stocking
| Date | Species | Since previous |
|---|---|---|
Week of Sep 22 Sep 22 to Sep 28 | Trout |
From Colorado fish and wildlife agency reports, collected nightly and kept after the agency takes them down. Agencies revise reports; check the agency's report before you go. Seasons and limits: Colorado fishing regulations.
Where is Gross Reservoir?
Boulder County, Colorado. The marker is the agency's location for this water; streams are often stocked at several access points.
Stocked waters near Gross Reservoir
- Viele Lakelake · 6 mistocked Feb 26, 2026
- Barker Reservoirlake · 7 mistocked Jun 12, 2026
- Thunderbird Lakelake · 8 mistocked Nov 10, 2017
- Wonderland Lakelake · 8 mistocked Apr 21, 2020
- Kriley Pondpond · 9 mistocked Aug 21, 2026
- Slough Pondpond · 9 mistocked Aug 21, 2026
- KOA Lake - Boulderlake · 9 mistocked Apr 3, 2026
- Harper Lakelake · 11 mistocked Mar 13, 2026
All stocked waters in Boulder CountyStocked this week in Colorado
Questions about Gross Reservoir
- When was Gross Reservoir last stocked?
- The latest reported stocking was Oct 25 to 31, 2016, according to Colorado agency reports.
- Is Gross Reservoir stocked often?
- Number 12 of 17 stocked waters in Boulder County by stocking days. Stocked less often than most Colorado waters on our record. We count each day the agency reported stocking it.
- How warm is the water near Gross Reservoir?
- The nearest USGS gage read 57°F on Sep 29. Prime range for trout (about 50 to 65°F): fish are feeding actively.
Stocking report from Colorado Parks and Wildlife, which lists the waters stocked with catchable trout (about 10 inches) in the week before each report. Locations from the Colorado Fishing Atlas.