diff --git a/src/lib/activity-colors.ts b/src/lib/activity-colors.ts
index 8eea9f5..c9e28bb 100644
--- a/src/lib/activity-colors.ts
+++ b/src/lib/activity-colors.ts
@@ -34,7 +34,8 @@ const TYPE_SLOT: Record<string, number> = {
 	'backcountry ski': 6,
 	'nordic ski': 6,
 	snowboard: 6,
-	snowshoe: 6
+	snowshoe: 6,
+	segment: 7
 };
 
 function hash(s: string): number {
diff --git a/src/lib/components/Map.svelte b/src/lib/components/Map.svelte
index a220247..d79ee04 100644
--- a/src/lib/components/Map.svelte
+++ b/src/lib/components/Map.svelte
@@ -41,6 +41,7 @@
 		highlightId = null,
 		focus = null,
 		hoverPoint = null,
+		selection = null,
 		height = '100%',
 		onpeakclick,
 		onviewport
@@ -50,6 +51,7 @@
 		highlightId?: number | null;
 		focus?: [[number, number], [number, number]] | null;
 		hoverPoint?: { lat: number; lon: number } | null;
+		selection?: [number, number][] | null;
 		height?: string;
 		onpeakclick?: (id: number) => void;
 		onviewport?: (view: Viewport) => void;
@@ -103,7 +105,8 @@
 						date: track.date ?? '',
 						distance_m: track.distance_m ?? 0,
 						color: dark ? color.dark : color.light,
-						dim: highlightId !== null && track.id !== highlightId
+						dim: highlightId !== null && track.id !== highlightId,
+						highlight: highlightId !== null && track.id === highlightId
 					},
 					geometry: {
 						type: 'LineString' as const,
@@ -188,6 +191,31 @@
 			hoverGeojson()
 		);
 	});
+	function selectionGeojson(): FeatureCollection {
+		return {
+			type: 'FeatureCollection',
+			features:
+				selection && selection.length > 1
+					? [
+							{
+								type: 'Feature',
+								properties: {},
+								geometry: {
+									type: 'LineString',
+									coordinates: selection.map(([lat, lon]) => [lon, lat])
+								}
+							}
+						]
+					: []
+		};
+	}
+	$effect(() => {
+		void selection;
+		if (!loaded) return;
+		(map?.getSource('selection') as import('maplibre-gl').GeoJSONSource | undefined)?.setData(
+			selectionGeojson()
+		);
+	});
 
 	// animate the camera when a page requests a new focus; remember the
 	// unfocused camera so returning to the overview restores it instead of
@@ -258,8 +286,8 @@
 			layout: { 'line-join': 'round', 'line-cap': 'round' },
 			paint: {
 				'line-color': dark ? '#1a1a19' : '#ffffff',
-				'line-width': 5,
-				'line-opacity': ['case', ['get', 'dim'], 0.08, 0.6]
+				'line-width': ['case', ['get', 'highlight'], 8, 5],
+				'line-opacity': ['case', ['get', 'dim'], 0.08, ['get', 'highlight'], 0.9, 0.6]
 			}
 		});
 		map.addLayer({
@@ -269,7 +297,7 @@
 			layout: { 'line-join': 'round', 'line-cap': 'round' },
 			paint: {
 				'line-color': ['get', 'color'],
-				'line-width': 2.5,
+				'line-width': ['case', ['get', 'highlight'], 4.5, 2.5],
 				'line-opacity': ['case', ['get', 'dim'], 0.15, 1]
 			}
 		});
@@ -310,6 +338,20 @@
 			}
 		});
 
+		// live preview of a segment being created (accent, on top of tracks)
+		map.addSource('selection', { type: 'geojson', data: selectionGeojson() });
+		map.addLayer({
+			id: 'selection-line',
+			type: 'line',
+			source: 'selection',
+			layout: { 'line-join': 'round', 'line-cap': 'round' },
+			paint: {
+				'line-color': dark ? '#e66767' : '#e34948',
+				'line-width': 5,
+				'line-opacity': 0.95
+			}
+		});
+
 		// chart-hover position marker, matching the chart's crosshair dot
 		map.addSource('hover-point', { type: 'geojson', data: hoverGeojson() });
 		map.addLayer({
diff --git a/src/lib/map-state.svelte.ts b/src/lib/map-state.svelte.ts
index 3255b52..1baf1ad 100644
--- a/src/lib/map-state.svelte.ts
+++ b/src/lib/map-state.svelte.ts
@@ -11,6 +11,7 @@ let highlightId = $state<number | null>(null);
 let focus = $state<Bounds | null>(null);
 let detailTrack = $state<MapTrack | null>(null);
 let hoverPoint = $state<{ lat: number; lon: number } | null>(null);
+let selection = $state<[number, number][] | null>(null);
 let carrier = $state<HTMLElement | null>(null);
 let active = $state(false);
 let wanted = $state(false);
@@ -37,6 +38,12 @@ export const mapState = {
 	get hoverPoint() {
 		return hoverPoint;
 	},
+	get selection() {
+		return selection;
+	},
+	setSelection(latlngs: [number, number][] | null) {
+		selection = latlngs;
+	},
 	get carrier() {
 		return carrier;
 	},
@@ -78,6 +85,7 @@ export const mapState = {
 		focus = null;
 		detailTrack = null;
 		hoverPoint = null;
+		selection = null;
 		peakClickHandler = null;
 		viewportHandler = null;
 	},
diff --git a/src/lib/server/db.ts b/src/lib/server/db.ts
index b2f85bd..9945ffe 100644
--- a/src/lib/server/db.ts
+++ b/src/lib/server/db.ts
@@ -495,6 +495,37 @@ export function deleteSegment(id: number, userId: number): boolean {
 	return result.changes > 0;
 }
 
+/** Every effort on a segment, fastest first (untimed last, by date). */
+export function segmentAllEfforts(segmentId: number): {
+	id: number;
+	user_id: number;
+	username: string;
+	activity_id: number;
+	activity_name: string;
+	elapsed_s: number | null;
+	date: string | null;
+}[] {
+	return db
+		.prepare(
+			`SELECT e.id, e.user_id, u.username, e.activity_id, a.name activity_name,
+			        e.elapsed_s, e.date
+			 FROM segment_efforts e
+			 JOIN users u ON u.id = e.user_id
+			 JOIN activities a ON a.id = e.activity_id
+			 WHERE e.segment_id = ?
+			 ORDER BY e.elapsed_s IS NULL, e.elapsed_s ASC, e.date DESC`
+		)
+		.all(segmentId) as {
+		id: number;
+		user_id: number;
+		username: string;
+		activity_id: number;
+		activity_name: string;
+		elapsed_s: number | null;
+		date: string | null;
+	}[];
+}
+
 export function segmentEffortsForActivity(activityId: number): { segment_id: number; name: string; elapsed_s: number | null }[] {
 	return db
 		.prepare(
diff --git a/src/routes/+layout.svelte b/src/routes/+layout.svelte
index 0caf84a..f013f74 100644
--- a/src/routes/+layout.svelte
+++ b/src/routes/+layout.svelte
@@ -168,6 +168,7 @@
 			highlightId={mapState.highlightId}
 			focus={mapState.focus}
 			hoverPoint={mapState.hoverPoint}
+			selection={mapState.selection}
 			onpeakclick={(id) => mapState.handlePeakClick(id)}
 			onviewport={(view) => mapState.handleViewport(view)}
 		/>
diff --git a/src/routes/activities/[id]/+page.svelte b/src/routes/activities/[id]/+page.svelte
index 98f838f..bfd9ea0 100644
--- a/src/routes/activities/[id]/+page.svelte
+++ b/src/routes/activities/[id]/+page.svelte
@@ -32,6 +32,23 @@
     segEnd = Math.round(a.distance_m);
   });
 
+  // live preview of the selected slice on the map
+  $effect(() => {
+    if (!segmenting) {
+      mapState.setSelection(null);
+      return;
+    }
+    const from = Math.min(segStart, segEnd);
+    const to = Math.max(segStart, segEnd);
+    const slice: [number, number][] = [];
+    for (let i = 0; i < data.trackD.length; i++) {
+      if (data.trackD[i] >= from && data.trackD[i] <= to)
+        slice.push(data.latlngs[i]);
+    }
+    mapState.setSelection(slice);
+    return () => mapState.setSelection(null);
+  });
+
   // chart hover -> marker on the map at the matching track position
   function pointAt(d: number): [number, number] {
     const trackD = data.trackD;
diff --git a/src/routes/segments/[id]/+page.server.ts b/src/routes/segments/[id]/+page.server.ts
index 172338f..391ab96 100644
--- a/src/routes/segments/[id]/+page.server.ts
+++ b/src/routes/segments/[id]/+page.server.ts
@@ -1,5 +1,5 @@
 import { error, redirect } from '@sveltejs/kit';
-import { deleteSegment, getSegment, segmentLeaderboard } from '$lib/server/db';
+import { deleteSegment, getSegment, segmentAllEfforts, segmentLeaderboard } from '$lib/server/db';
 import type { Actions, PageServerLoad } from './$types';
 import type { TrackPt } from '$lib/server/segments';
 
@@ -12,6 +12,7 @@ export const load: PageServerLoad = ({ params, locals }) => {
 		segment: { ...segment, points: undefined },
 		latlngs: points.map((p) => [p.lat, p.lon] as [number, number]),
 		leaderboard: segmentLeaderboard(segment.id),
+		efforts: segmentAllEfforts(segment.id),
 		myUserId: locals.user?.id ?? null,
 		canDelete:
 			!!locals.user && (segment.creator_id === locals.user.id || segment.creator_id === null)
diff --git a/src/routes/segments/[id]/+page.svelte b/src/routes/segments/[id]/+page.svelte
index 90077a5..e98a492 100644
--- a/src/routes/segments/[id]/+page.svelte
+++ b/src/routes/segments/[id]/+page.svelte
@@ -83,6 +83,27 @@
 	</div>
 {/if}
 
+{#if data.efforts.length > 0}
+	<h2>All efforts ({data.efforts.length})</h2>
+	<div class="card table-wrap">
+		<table>
+			<thead>
+				<tr><th>Athlete</th><th>Time</th><th>Date</th><th>Activity</th></tr>
+			</thead>
+			<tbody>
+				{#each data.efforts as effort (effort.id)}
+					<tr class:me={effort.user_id === data.myUserId}>
+						<td><a href="/users/{effort.username}">{effort.username}</a></td>
+						<td class="time">{effort.elapsed_s !== null ? fmtElapsed(effort.elapsed_s) : '–'}</td>
+						<td>{effort.date ? fmtDate(effort.date) : '–'}</td>
+						<td><a href="/activities/{effort.activity_id}">{effort.activity_name}</a></td>
+					</tr>
+				{/each}
+			</tbody>
+		</table>
+	</div>
+{/if}
+
 <style>
 	.back {
 		display: inline-block;