Riera de Merlès

{{Infobox river

| name = Merlès

| image = Merlès.jpg

| image_size = 200

| image_alt =

| image_caption = The riera de Merlès in winter, passing through the village of Santa Maria de Merlès

| map =

| map_size = 200

| map_alt =

| map_caption =

| source1_location = Rasos de Tubau in Sant Jaume de Frontanyà and Viladonja

| mouth_location = Llobregat River in Puig-reig

| subdivision_type1 = Country

| subdivision_name1 = Spain

| progression =

| length =

| source1_elevation = {{convert|1485|m|ft|abbr=on}}{{cite web|url=http://www.icc.cat/vissir3/|title=VISSIR3|work=Mapa Topogràfic de Catalunya|publisher=Institut Cartogràfic de Catalunya|accessdate= 23 February 2014|language=Catalan}}

| mouth_elevation = {{convert|345|m|ft|abbr=on}}

| mouth_coordinates = {{coord|41|55|36.01|N|1|52|55.51|E|region:ES-CT|display=inline,title}}

| discharge1_avg = {{convert|0.90|m3/s|cuft/s|abbr=on}}{{cite web|title=Riera de Merlès|url=http://www.enciclopedia.cat/enciclop%C3%A8dies/gran-enciclop%C3%A8dia-catalana/EC-GEC-0042096.xml|work=L'Enciclopèdia.cat|publisher=Grup Enciclopèdia Catalana|accessdate= 23 February 2014|language=Catalan}}

| basin_size_km2 = 173

| basin_size_ref =

| river_system = Llobregat

| tributaries_left =

| tributaries_right =

}}

The Riera de Merlès is a small river that passes through the comarques of Osona, Bages, and Berguedà. It is formed by the confluence of several small mountain creeks and torrents that descend the Rasos de Tubau, in the municipalities of Sant Jaume de Frontanyà and Les Llosses.

Historically, the Merlès marked several administrative frontiers. These include the ancient counties of Berga and Osona, the dioceses of Solsona and Vic, and the modern comarques of Berguedà and Lluçanès.