Where is Diablo Lake?

Diablo Lake is a lake in Whatcom County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.

How deep is Diablo Lake?

Diablo Lake has a maximum depth of 220 feet. The lake covers 790 acres.

Are there campgrounds on Diablo Lake?

Diablo Lake has 5 public campgrounds from USGS The National Map within 5 km, including Colonial Creek North Campground, Colonial Creek North Loop, Colonial Creek Campground, Colonial Creek South Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.

Diablo Lake

Whatcom County, Washington790 acresView map Directions

No nutrient or algae sampling on record from Washington Ecology for this lake.

Max depth

220 ft

Bathymetric survey

Area

790 acres

Surface area

Shoreline

14.9 mi

Measured length

220 ft max depth

See the measurements Directions Where to stay

Diablo Lake in Whatcom County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Maximum depth: 220 ft. Surface area: 790 acres.

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Diablo Lake is a 790-acre lake in Whatcom County, Washington with a maximum depth of 220 feet.

Source: EPA Water Quality Portal sampling records, WA Ecology. Methodology: how these readings are compared.

What Diablo Lake is good for

From access and monitoring records, not editorial picks.

Camping5 public campgrounds nearby
Deep water220 ft surveyed max depth

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Diablo Lake is safe to swim in today is a call for the Washington State Department of Ecology and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Diablo Lake

These are the measurements Washington Ecology publishes for Diablo Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. TSI undefined.

Ask about Diablo Lake

Answers come straight from the public measurements and survey records on this page.

→ Diablo Lake water level: the live USGS gauge reading

Lake Details

Max depth

220 ft

Surface area

790 acres

Shoreline

14.9 mi

Recreation & Access

Campgrounds

Public campgrounds near Diablo Lake

Colonial Creek North Campground1.8 kmReserve
Colonial Creek North Loop1.8 km
Colonial Creek Campground1.9 km
Colonial Creek South Campground1.9 kmReserve
Colonial Creek South Loop2.2 km

Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes

Stays via Stay22

Stays near Diablo Lake

Compare lakeside cabins, hotels, and vacation rentals near Diablo Lake in Whatcom County, Washington — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Diablo Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a whole trip? See where to stay at Washington’s top lakes →

Follow Diablo Lake’s readings

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Fishing Diablo Lake

→ Diablo Lake fishing regulations (limits, seasons, special rules)

Nearby Lakes in Whatcom County

Sourdough Lake3.8 miView →Gorge Lake3.1 miView →Azure Lake8.1 miView →Jerry Lakes8.7 miView →Jerry Lakes9.1 miView →Thornton Lakes10.5 miView →

Frequently asked questions about Diablo Lake

Where is Diablo Lake?: Diablo Lake is a lake in Whatcom County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Diablo Lake?: Diablo Lake in Whatcom County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Maximum depth: 220 ft. Surface area: 790 acres.
Is Diablo Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Diablo Lake?: Diablo Lake has a maximum depth of 220 feet. The lake covers 790 acres.
Are there campgrounds on Diablo Lake?: Diablo Lake has 5 public campgrounds from USGS The National Map within 5 km, including Colonial Creek North Campground, Colonial Creek North Loop, Colonial Creek Campground, Colonial Creek South Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.