diff --git a/dashboard/builders.go b/dashboard/builders.go
index 13320e7..447c471 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -1388,19 +1388,17 @@
 		Name:     "freebsd-amd64-10_3",
 		HostType: "host-freebsd-10_3",
 		buildsRepo: func(repo, branch, goBranch string) bool {
-			return (branch == "release-branch.go1.11" || goBranch == "release-branch.go1.12") &&
-				defaultBuildsRepoPolicy(repo, branch, goBranch)
+			return goBranch == "release-branch.go1.12" && defaultBuildsRepoPolicy(repo, branch, goBranch)
 		},
 		tryBot: func(repo, branch, goBranch string) bool {
-			return branch == "release-branch.go1.11" || branch == "release-branch.go1.12"
+			return branch == "release-branch.go1.12"
 		},
 	})
 	addBuilder(BuildConfig{
 		Name:     "freebsd-amd64-10_4",
 		HostType: "host-freebsd-10_4",
 		buildsRepo: func(repo, branch, goBranch string) bool {
-			return (goBranch == "release-branch.go1.11" || goBranch == "release-branch.go1.12") &&
-				defaultBuildsRepoPolicy(repo, branch, goBranch)
+			return goBranch == "release-branch.go1.12" && defaultBuildsRepoPolicy(repo, branch, goBranch)
 		},
 		tryBot: nil,
 	})
@@ -1409,8 +1407,7 @@
 		HostType: "host-freebsd-11_1",
 		tryBot:   nil,
 		buildsRepo: func(repo, branch, goBranch string) bool {
-			return (goBranch == "release-branch.go1.11" || goBranch == "release-branch.go1.12") &&
-				defaultBuildsRepoPolicy(repo, branch, goBranch)
+			return goBranch == "release-branch.go1.12" && defaultBuildsRepoPolicy(repo, branch, goBranch)
 		},
 		shouldRunDistTest: fasterTrybots,
 		numTryTestHelpers: 4,
@@ -1436,12 +1433,6 @@
 		HostType:          "host-freebsd-12_0",
 		env:               []string{"GOARCH=386", "GOHOSTARCH=386"},
 		shouldRunDistTest: fasterTrybots,
-		buildsRepo: func(repo, branch, goBranch string) bool {
-			if repo == "net" && branch == "master" && goBranch == "release-branch.go1.11" {
-				return false
-			}
-			return defaultBuildsRepoPolicy(repo, branch, goBranch)
-		},
 		numTryTestHelpers: 4,
 	})
 	addBuilder(BuildConfig{
@@ -1452,7 +1443,7 @@
 		Name:     "freebsd-386-10_3",
 		HostType: "host-freebsd-10_3",
 		buildsRepo: func(repo, branch, goBranch string) bool {
-			return goBranch == "release-branch.go1.11" || goBranch == "release-branch.go1.12"
+			return goBranch == "release-branch.go1.12"
 		},
 		env: []string{"GOARCH=386", "GOHOSTARCH=386"},
 	})
@@ -1460,7 +1451,7 @@
 		Name:     "freebsd-386-10_4",
 		HostType: "host-freebsd-10_4",
 		buildsRepo: func(repo, branch, goBranch string) bool {
-			return goBranch == "release-branch.go1.11" || goBranch == "release-branch.go1.12"
+			return goBranch == "release-branch.go1.12"
 		},
 		env: []string{"GOARCH=386", "GOHOSTARCH=386"},
 	})
@@ -1469,7 +1460,7 @@
 		HostType:          "host-freebsd-11_1",
 		shouldRunDistTest: noTestDir,
 		buildsRepo: func(repo, branch, goBranch string) bool {
-			return goBranch == "release-branch.go1.11" || goBranch == "release-branch.go1.12"
+			return goBranch == "release-branch.go1.12"
 		},
 		env: []string{"GOARCH=386", "GOHOSTARCH=386"},
 	})
@@ -1477,14 +1468,8 @@
 		Name:              "freebsd-386-11_2",
 		HostType:          "host-freebsd-11_2",
 		shouldRunDistTest: noTestDir,
-		buildsRepo: func(repo, branch, goBranch string) bool {
-			if repo == "net" && branch == "master" && goBranch == "release-branch.go1.11" {
-				return false
-			}
-			return defaultBuildsRepoPolicy(repo, branch, goBranch)
-		},
-		tryBot: explicitTrySet("sys"),
-		env:    []string{"GOARCH=386", "GOHOSTARCH=386"},
+		tryBot:            explicitTrySet("sys"),
+		env:               []string{"GOARCH=386", "GOHOSTARCH=386"},
 	})
 	addBuilder(BuildConfig{
 		Name:              "linux-386",
diff --git a/dashboard/builders_test.go b/dashboard/builders_test.go
index 69f4bc9..8ea91ec 100644
--- a/dashboard/builders_test.go
+++ b/dashboard/builders_test.go
@@ -301,25 +301,22 @@
 		// Don't test all subrepos on all the builders.
 		{b("linux-amd64-ssacheck", "net"), none},
 		{b("linux-amd64-ssacheck@go1.10", "net"), none},
-		{b("linux-amd64-noopt@go1.11", "net"), none},
-		{b("linux-386-387@go1.11", "net"), none},
-		{b("linux-386-387@go1.11", "go"), onlyPost},
 		{b("linux-386-387", "crypto"), onlyPost},
-		{b("linux-arm-arm5spacemonkey@go1.11", "net"), none},
 		{b("linux-arm-arm5spacemonkey@go1.12", "net"), none},
 		{b("linux-arm-arm5spacemonkey", "exp"), none},
 		{b("linux-arm-arm5spacemonkey", "mobile"), none},
 
 		// The mobile repo requires Go 1.13+.
-		{b("android-amd64-emu", "go"), both},
 		{b("android-amd64-emu", "mobile"), both},
 		{b("android-amd64-emu", "mobile@1.10"), none},
 		{b("android-amd64-emu", "mobile@1.11"), none},
 		{b("android-amd64-emu@go1.10", "mobile"), none},
-		{b("android-amd64-emu@go1.11", "mobile"), none},
 		{b("android-amd64-emu@go1.12", "mobile"), none},
 		{b("android-amd64-emu@go1.13", "mobile"), both},
 		{b("android-amd64-emu", "mobile@1.13"), both},
+		{b("freebsd-386-11_1@go1.12", "mobile"), onlyPost}, // TODO(dmitshur, golang.org/issue/36506): accurately refrects current state, but should be changed to none
+
+		{b("android-amd64-emu", "go"), both},
 		{b("android-amd64-emu", "crypto"), both},
 		{b("android-amd64-emu", "net"), both},
 		{b("android-amd64-emu", "sync"), both},
@@ -334,7 +331,6 @@
 		{b("android-386-emu", "mobile@1.10"), none},
 		{b("android-386-emu", "mobile@1.11"), none},
 		{b("android-386-emu@go1.10", "mobile"), none},
-		{b("android-386-emu@go1.11", "mobile"), none},
 		{b("android-386-emu@go1.12", "mobile"), none},
 		{b("android-386-emu@go1.13", "mobile"), onlyPost},
 		{b("android-386-emu", "mobile@1.13"), onlyPost},
@@ -346,8 +342,6 @@
 		{b("linux-amd64", "net@1.11"), both},
 		{b("linux-amd64", "net@1.10"), none},   // too old
 		{b("linux-amd64@go1.10", "net"), none}, // too old
-		{b("linux-amd64@go1.11", "net"), both},
-		{b("linux-amd64@go1.11", "net@1.11"), both},
 		{b("linux-amd64@go1.12", "net@1.12"), both},
 
 		{b("linux-mips64le-mengzhuo", "go"), onlyPost},
@@ -368,12 +362,6 @@
 		{b("freebsd-amd64-10_3@go1.12", "go"), both},
 		{b("freebsd-amd64-10_3@go1.12", "net@1.12"), both},
 		{b("freebsd-amd64-10_3@go1.12", "mobile"), none},
-		{b("freebsd-amd64-10_3@go1.11", "go"), both},
-		{b("freebsd-amd64-10_3@go1.11", "net@1.11"), both},
-		{b("freebsd-amd64-10_3@go1.11", "mobile"), none},
-		{b("freebsd-amd64-10_4@go1.11", "go"), isBuilder},
-		{b("freebsd-amd64-10_4@go1.11", "net"), isBuilder},
-		{b("freebsd-amd64-10_4@go1.11", "mobile"), none},
 		{b("freebsd-amd64-10_4@go1.12", "go"), isBuilder},
 		{b("freebsd-amd64-10_4@go1.12", "net"), isBuilder},
 		{b("freebsd-amd64-10_4@go1.12", "mobile"), none},
@@ -383,9 +371,6 @@
 		{b("freebsd-amd64-11_1@go1.12", "go"), isBuilder},
 		{b("freebsd-amd64-11_1@go1.12", "net@1.12"), isBuilder},
 		{b("freebsd-amd64-11_1@go1.12", "mobile"), none},
-		{b("freebsd-amd64-11_1@go1.11", "go"), isBuilder},
-		{b("freebsd-amd64-11_1@go1.11", "net@1.11"), isBuilder},
-		{b("freebsd-amd64-11_1@go1.11", "mobile"), none},
 
 		// FreeBSD 12.0
 		{b("freebsd-amd64-12_0", "go"), both},
@@ -412,9 +397,6 @@
 		{b("aix-ppc64@go1.12", "mobile"), none},
 		{b("aix-ppc64@go1.13", "net"), onlyPost},
 		{b("aix-ppc64@go1.13", "mobile"), none},
-		{b("aix-ppc64@go1.11", "go"), none},
-		{b("aix-ppc64@go1.11", "net"), none},
-		{b("aix-ppc64@go1.11", "mobile"), none},
 
 		{b("linux-amd64-nocgo", "mobile"), none},
 
@@ -508,7 +490,6 @@
 		{b("js-wasm", "exp"), none},
 
 		// exp is experimental; it doesn't test against release branches.
-		{b("linux-amd64@go1.11", "exp"), none},
 		{b("linux-amd64@go1.12", "exp"), none},
 
 		// the build repo is only really useful for linux-amd64 (where we run it),
@@ -535,11 +516,8 @@
 
 		// Only use latest macOS for subrepos, and only amd64:
 		{b("darwin-amd64-10_12", "net"), onlyPost},
-		{b("darwin-amd64-10_12@go1.11", "net"), onlyPost},
 		{b("darwin-amd64-10_11", "net"), none},
-		{b("darwin-amd64-10_11@go1.11", "net"), none},
 		{b("darwin-amd64-10_11@go1.12", "net"), none},
-		{b("darwin-386-10_14@go1.11", "net"), none},
 
 		{b("darwin-amd64-10_15", "go"), onlyPost},
 		{b("darwin-amd64-10_14", "go"), onlyPost},
@@ -547,7 +525,6 @@
 		{b("darwin-amd64-10_11", "go"), onlyPost},
 		{b("darwin-amd64-10_10", "go"), none},
 		{b("darwin-amd64-10_10@go1.12", "go"), onlyPost},
-		{b("darwin-amd64-10_10@go1.11", "go"), onlyPost},
 		{b("darwin-386-10_14", "go"), onlyPost},
 		{b("darwin-386-10_14@go1.12", "go"), none},
 		{b("darwin-386-10_14@go1.13", "go"), onlyPost},
@@ -558,33 +535,21 @@
 		{b("plan9-386", "net"), none}, // temporarily disabled
 		{b("plan9-386", "exp"), none},
 		{b("plan9-386", "mobile"), none},
-		{b("plan9-386@go1.11", "go"), none},
 		{b("plan9-386@go1.12", "go"), none},
-		{b("plan9-386@go1.11", "net"), none},
 		{b("plan9-386@go1.12", "net"), none},
 		{b("plan9-amd64-9front", "go"), onlyPost},
 		{b("plan9-amd64-9front", "exp"), none},
 		{b("plan9-amd64-9front", "mobile"), none},
-		{b("plan9-amd64-9front@go1.11", "go"), none},
 		{b("plan9-amd64-9front@go1.12", "go"), none},
 		{b("plan9-amd64-9front", "net"), onlyPost},
-		{b("plan9-amd64-9front@go1.11", "net"), none},
 		{b("plan9-amd64-9front@go1.12", "net"), none},
 		{b("plan9-arm", "go"), onlyPost},
 		{b("plan9-arm", "exp"), none},
 		{b("plan9-arm", "mobile"), none},
-		{b("plan9-arm@go1.11", "go"), none},
 		{b("plan9-arm@go1.12", "go"), none},
 		{b("plan9-arm", "net"), onlyPost},
-		{b("plan9-arm@go1.11", "net"), none},
 		{b("plan9-arm@go1.12", "net"), none},
 
-		// x/net master with Go 1.11 doesn't work on our builders
-		// on 32-bit FreeBSD. Remove distracting red from the dashboard
-		// that'll never be fixed.
-		{b("freebsd-386-11_2@go1.11", "net"), none},
-		{b("freebsd-386-12_0@go1.11", "net"), none},
-
 		{b("dragonfly-amd64", "go"), onlyPost},
 		{b("dragonfly-amd64", "net"), onlyPost},
 		{b("dragonfly-amd64@go1.13", "net"), none}, // Dragonfly ABI changes only supported by Go 1.14+