Richard Lake

Where Richard Lake is

Richard Lake lies in the District of Sudbury, within the City of Greater Sudbury.

How deep is Richard Lake?

Richard Lake reaches a maximum recorded depth of 10.4 meters, determined from 4,200 soundings.

See also Ontario's Largest and Deepest Lakes

Surveyed Depths

Ontario has surveyed the depths of several thousand of its lakes over more than half a century. Later surveys were conducted by boat with satellite positioning and produced hundreds of thousands of soundings per lake. Earlier surveys were charted by running transects across the water and drawing depth contours by hand.

Water quality

Ontario’s Lake Partner Program is a volunteer monitoring network. Participants collect water samples for phosphorus analysis and measure water clarity through the summer with a Secchi disk. Most sites are sampled for phosphorus once a year, in spring, and some several times a year between spring and fall. Phosphorus in many lakes rises through the summer, so the two kinds of average are measured on different bases.

Phosphorus is the nutrient that controls how much algae a lake can grow. A lake with little phosphorus stays clear and supports cold-water fish such as lake trout. As phosphorus rises, algae increase, the water clouds, and oxygen in the deep water falls as the algae decay. The province classifies each monitoring site by its average phosphorus:

• Oligotrophic, below 10 micrograms per litre: clear water and low algae.
• Mesotrophic, from 10 to 20: moderately productive water, with more algae and weed growth than an oligotrophic lake but rarely a bloom.
• Eutrophic, above 20: nutrient-rich water, prone to algal blooms and low oxygen at depth.

Richard Lake has 4 Lake Partner monitoring sites. Two have reported phosphorus for the three or more years the province requires before a status is assigned. All are classified oligotrophic.

The longest record is held by site 4621/4 at Sudbury-Mid Lake RIC-3, with phosphorus sampled once a year over 13 years to 2025. Its long-term mean phosphorus concentration is 7.94 micrograms per litre, within the oligotrophic band, which extends to 10.

A Secchi disk is a white or black-and-white plate lowered on a marked line until it disappears from view. The depth at which it vanishes is the Secchi depth, a direct measure of water clarity. Clearer water gives a deeper reading.

See also Lake Water Quality and Blue-Green Algae in Ontario

Richard Lake Weather

The weather page for Richard Lake carries the forecast over the water, wave heights across the lake, and the modelled water temperature.

Richard Lake weather

Water temperature

Ontario’s aquatic resource records class Richard Lake as a warm-water lake.

A lake separates into layers through the summer where it is deep enough. Sunlight and wind warm and mix the upper few meters, and beneath a band of rapid cooling, the thermocline, the water stays cold. A shallow lake mixes to the bottom instead and warms through, sooner in spring and later into autumn.

No provincial monitoring station records water temperature on Richard Lake. The LastLake model computes the temperature of its surface water for each day from the daily mean air temperature at Environment Canada’s Sudbury A climate station, 22 kilometers from the lake, or the next nearest station when its record is incomplete, and from the lake’s area of 83 hectares and its mean depth. The province’s records give no mean depth for Richard Lake; the model uses 2.9 meters, estimated from its deepest mapped contour.

Each day’s figure carries the model’s typical error for that month on lakes of the same size. The figure in the chart below is the temperature near the surface, away from the shoreline. Bays, shallows and water deeper below the surface differ in temperature. Temperature is not measured when ice covers the lake. The weather page for Richard Lake carries the model’s figures for the past weeks and the coming week.

See also Lake Water Temperature in Ontario

Fish in Richard Lake

Ontario’s aquatic resource records name 7 fish species in Richard Lake. The province’s other records for the lake name two further species, smallmouth bass and muskellunge. They appear in the records below.

Popular species in the province’s records

• Northern Pikepike
• Walleyeperch
• Yellow Perchperch
• Smallmouth Basssunfish
• Largemouth Basssunfish
• Pumpkinseedsunfish

Spawning areas

Ontario maps 1 fish spawning record within the Richard Lake outline: 1 northern pike spawning area covering 4.15 hectares. Every record is recorded as verified and presently suitable, and none is classed as sensitive.

By number of records

By area mapped

• Northern Pike1 area4.2 ha

The federal Fisheries Act prohibits the harmful alteration, disruption or destruction of fish habitat without an authorization, so a dock, dredging, infill or shoreline work at a mapped spawning area is reviewed on that basis.

Stocking history

Ontario’s stocking records for Richard Lake run from 1946 to 2015 and hold 27 releases. Walleye account for most of the fish: 2,202,835 released in seventeen of the years between 1946 and 2015. The last recorded release was 14,083 walleye frys in 2015.

Eating the fish

The 2026 Guide to Eating Ontario Fish carries consumption advice for four species taken from Richard Lake, tested for contaminants at a sampling location in Dill Twp., Sudbury Dist. Each figure below is the most meals a month the guide advises for a fish of that length. Where mercury sets the advice, the figure falls as the fish gets longer, because mercury accumulates over a fish’s life. Where the guide has no result yet for certain contaminants at a location, it sets a precautionary limit of 16 meals a month. A zero means the guide advises no meals of that fish at that size.

General population: adultsSensitive population: children under fifteen, women who are or may become pregnant

Fisheries Management Zone 10

Richard Lake lies in Fisheries Management Zone 10. Ontario sets its fishing seasons and catch limits by zone.

Fisheries management zones around Richard Lake

See also Fishing Seasons in Ontario, Zone by Zone and Fish Stocking in Ontario Lakes

Richard Lake Ice Fishing

An ice hut on Richard Lake must be removed by March 31. The province sets dates for ice hut removal as a safety measure to ensure huts are removed before thawing occurs. One date applies to an entire fisheries management zone (FMZ). Richard Lake lies within FMZ 10.

An ice hut must also be removed before the ice breaks up, whether or not that date has passed. The deadline clears huts from the ice ahead of the thaw and does not close the fishing season.

Registration is required in FMZ 10 for an ice hut built of anything other than fabric, and for a fabric tent covering seven square meters or more. Registration is free, and the number is displayed on the outside of the hut.

Ice conditions

No public record reports the thickness or the condition of the ice on Richard Lake on any given day. Ontario publishes ice safety guidance for anyone going out on the ice, at ontario.ca.

See also Lake Ice in Ontario and When the Lakes Will Freeze This Winter

Nearby lakes

• Ramsey Lake5 km away
• Nepahwin Lake6 km away
• Long Lake17 km away
• Nepewassi Lake22 km away

All lakes

Questions about Richard Lake

• How deep is Richard Lake?

  Its maximum recorded depth is 10.4 meters.

• How big is Richard Lake?

  Its surface covers 0.8 square kilometers, with 7 kilometers of shoreline.

• What fish are in Richard Lake?

  Ontario’s aquatic resource records name seven species, among them walleye, largemouth bass, northern pike and yellow perch. The lake’s spawning, consumption and stocking records also name smallmouth bass and muskellunge.

• Is the water clear?

  All two monitoring sites with a phosphorus status are classified oligotrophic, the clearest of the province’s three bands.