diff --git a/app.go b/app.go
index f5847d4..7cb9f9a 100644
--- a/app.go
+++ b/app.go
@@ -3712,7 +3712,7 @@ type CabrilloResult struct {
 }
 
 // cabrilloHeader fills the Cabrillo header from the active profile (callsign,
-// operator, grid) plus the contest name the user supplied.
+// operator, grid) plus the contest name (taken from the QSOs' ADIF CONTEST_ID).
 func (a *App) cabrilloHeader(contest string) cabrillo.Header {
 	h := cabrillo.Header{Contest: contest}
 	if a.profiles != nil {
@@ -3727,8 +3727,9 @@ func (a *App) cabrilloHeader(contest string) cabrillo.Header {
 }
 
 // writeCabrillo collects the QSOs via the given iterator and writes a Cabrillo
-// document to path.
-func (a *App) writeCabrillo(path, contest string, iterate func(func(qso.QSO) error) error) (CabrilloResult, error) {
+// document to path. The contest name is taken from the QSOs' ADIF CONTEST_ID
+// (the most common one), so no separate prompt is needed.
+func (a *App) writeCabrillo(path string, iterate func(func(qso.QSO) error) error) (CabrilloResult, error) {
 	if a.qso == nil {
 		return CabrilloResult{}, fmt.Errorf("db not initialized")
 	}
@@ -3736,9 +3737,24 @@ func (a *App) writeCabrillo(path, contest string, iterate func(func(qso.QSO) err
 		return CabrilloResult{}, fmt.Errorf("empty path")
 	}
 	var qsos []qso.QSO
-	if err := iterate(func(q qso.QSO) error { qsos = append(qsos, q); return nil }); err != nil {
+	contests := map[string]int{}
+	if err := iterate(func(q qso.QSO) error {
+		qsos = append(qsos, q)
+		if c := strings.TrimSpace(q.ContestID); c != "" {
+			contests[c]++
+		}
+		return nil
+	}); err != nil {
 		return CabrilloResult{}, err
 	}
+	// Pick the most-used CONTEST_ID across the exported QSOs.
+	contest := ""
+	best := 0
+	for c, n := range contests {
+		if n > best {
+			contest, best = c, n
+		}
+	}
 	f, err := os.Create(path)
 	if err != nil {
 		return CabrilloResult{}, err
@@ -3752,31 +3768,31 @@ func (a *App) writeCabrillo(path, contest string, iterate func(func(qso.QSO) err
 }
 
 // ExportCabrillo writes every QSO to a Cabrillo file.
-func (a *App) ExportCabrillo(path, contest string) (CabrilloResult, error) {
-	return a.writeCabrillo(path, contest, func(fn func(qso.QSO) error) error { return a.qso.IterateAll(a.ctx, fn) })
+func (a *App) ExportCabrillo(path string) (CabrilloResult, error) {
+	return a.writeCabrillo(path, func(fn func(qso.QSO) error) error { return a.qso.IterateAll(a.ctx, fn) })
 }
 
 // ExportCabrilloFiltered writes the QSOs matching the current filter.
-func (a *App) ExportCabrilloFiltered(path, contest string, f qso.QueryFilter) (CabrilloResult, error) {
-	return a.writeCabrillo(path, contest, func(fn func(qso.QSO) error) error { return a.qso.IterateFiltered(a.ctx, f, fn) })
+func (a *App) ExportCabrilloFiltered(path string, f qso.QueryFilter) (CabrilloResult, error) {
+	return a.writeCabrillo(path, func(fn func(qso.QSO) error) error { return a.qso.IterateFiltered(a.ctx, f, fn) })
 }
 
 // ExportCabrilloSelected writes only the highlighted QSOs.
-func (a *App) ExportCabrilloSelected(path, contest string, ids []int64) (CabrilloResult, error) {
+func (a *App) ExportCabrilloSelected(path string, ids []int64) (CabrilloResult, error) {
 	if len(ids) == 0 {
 		return CabrilloResult{}, fmt.Errorf("no QSOs selected")
 	}
-	return a.writeCabrillo(path, contest, func(fn func(qso.QSO) error) error { return a.qso.IterateByIDs(a.ctx, ids, fn) })
+	return a.writeCabrillo(path, func(fn func(qso.QSO) error) error { return a.qso.IterateByIDs(a.ctx, ids, fn) })
 }
 
-// SaveCabrilloFile opens a save dialog for a Cabrillo (.cbr / .log) file.
+// SaveCabrilloFile opens a save dialog for a Cabrillo (.log) file.
 func (a *App) SaveCabrilloFile() (string, error) {
-	suggested := "OpsLog_" + time.Now().UTC().Format("20060102_150405") + ".cbr"
+	suggested := "OpsLog_" + time.Now().UTC().Format("20060102_150405") + ".log"
 	return wruntime.SaveFileDialog(a.ctx, wruntime.SaveDialogOptions{
 		Title:           "Export Cabrillo",
 		DefaultFilename: suggested,
 		Filters: []wruntime.FileFilter{
-			{DisplayName: "Cabrillo files (*.cbr, *.log)", Pattern: "*.cbr;*.log"},
+			{DisplayName: "Cabrillo log (*.log, *.cbr)", Pattern: "*.log;*.cbr"},
 			{DisplayName: "All files (*.*)", Pattern: "*.*"},
 		},
 	})
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index d2e0947..8ecdebf 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -1981,37 +1981,31 @@ export default function App() {
       showToast(`Exported ${r.count} selected QSO${r.count > 1 ? 's' : ''} → ${r.path}`);
     } catch (e: any) { setError(String(e?.message ?? e)); }
   }
-  // Cabrillo (contest log) export — prompts for the contest name, then writes a
-  // .cbr file. All / filtered / selected variants mirror the ADIF ones.
+  // Cabrillo (contest log) export → a .log file. The contest name comes from the
+  // QSOs' ADIF CONTEST_ID (no prompt). All / filtered / selected mirror the ADIF ones.
   async function exportCabrillo() {
-    const contest = window.prompt('Contest name for Cabrillo (e.g. CQ-WW-SSB):', '');
-    if (contest === null) return;
     try {
       const path = await SaveCabrilloFile();
       if (!path) return;
-      const r = await ExportCabrillo(path, contest);
+      const r = await ExportCabrillo(path);
       showToast(`Cabrillo: ${r.count} QSO${r.count > 1 ? 's' : ''} → ${r.path}`);
     } catch (e: any) { setError(String(e?.message ?? e)); }
   }
   async function exportFilteredCabrillo() {
-    const contest = window.prompt('Contest name for Cabrillo (e.g. CQ-WW-SSB):', '');
-    if (contest === null) return;
     try {
       const path = await SaveCabrilloFile();
       if (!path) return;
       const f = buildActiveFilter();
-      const r = await ExportCabrilloFiltered(path, contest, { ...f, limit: 0, offset: 0 } as any);
+      const r = await ExportCabrilloFiltered(path, { ...f, limit: 0, offset: 0 } as any);
       showToast(`Cabrillo: ${r.count} QSO${r.count > 1 ? 's' : ''} → ${r.path}`);
     } catch (e: any) { setError(String(e?.message ?? e)); }
   }
   async function exportSelectedCabrillo(ids: number[]) {
     if (ids.length === 0) return;
-    const contest = window.prompt('Contest name for Cabrillo (e.g. CQ-WW-SSB):', '');
-    if (contest === null) return;
     try {
       const path = await SaveCabrilloFile();
       if (!path) return;
-      const r = await ExportCabrilloSelected(path, contest, ids as any);
+      const r = await ExportCabrilloSelected(path, ids as any);
       showToast(`Cabrillo: ${r.count} selected QSO${r.count > 1 ? 's' : ''} → ${r.path}`);
     } catch (e: any) { setError(String(e?.message ?? e)); }
   }
diff --git a/frontend/wailsjs/go/main/App.d.ts b/frontend/wailsjs/go/main/App.d.ts
index 5f00f58..43147d9 100644
--- a/frontend/wailsjs/go/main/App.d.ts
+++ b/frontend/wailsjs/go/main/App.d.ts
@@ -131,11 +131,11 @@ export function ExportADIFSelected(arg1:string,arg2:boolean,arg3:Array<number>):
 
 export function ExportAwards():Promise<string>;
 
-export function ExportCabrillo(arg1:string,arg2:string):Promise<main.CabrilloResult>;
+export function ExportCabrillo(arg1:string):Promise<main.CabrilloResult>;
 
-export function ExportCabrilloFiltered(arg1:string,arg2:string,arg3:qso.QueryFilter):Promise<main.CabrilloResult>;
+export function ExportCabrilloFiltered(arg1:string,arg2:qso.QueryFilter):Promise<main.CabrilloResult>;
 
-export function ExportCabrilloSelected(arg1:string,arg2:string,arg3:Array<number>):Promise<main.CabrilloResult>;
+export function ExportCabrilloSelected(arg1:string,arg2:Array<number>):Promise<main.CabrilloResult>;
 
 export function FilterFields():Promise<Array<string>>;
 
diff --git a/frontend/wailsjs/go/main/App.js b/frontend/wailsjs/go/main/App.js
index 9533836..5a5460a 100644
--- a/frontend/wailsjs/go/main/App.js
+++ b/frontend/wailsjs/go/main/App.js
@@ -226,16 +226,16 @@ export function ExportAwards() {
   return window['go']['main']['App']['ExportAwards']();
 }
 
-export function ExportCabrillo(arg1, arg2) {
-  return window['go']['main']['App']['ExportCabrillo'](arg1, arg2);
+export function ExportCabrillo(arg1) {
+  return window['go']['main']['App']['ExportCabrillo'](arg1);
 }
 
-export function ExportCabrilloFiltered(arg1, arg2, arg3) {
-  return window['go']['main']['App']['ExportCabrilloFiltered'](arg1, arg2, arg3);
+export function ExportCabrilloFiltered(arg1, arg2) {
+  return window['go']['main']['App']['ExportCabrilloFiltered'](arg1, arg2);
 }
 
-export function ExportCabrilloSelected(arg1, arg2, arg3) {
-  return window['go']['main']['App']['ExportCabrilloSelected'](arg1, arg2, arg3);
+export function ExportCabrilloSelected(arg1, arg2) {
+  return window['go']['main']['App']['ExportCabrilloSelected'](arg1, arg2);
 }
 
 export function FilterFields() {