diff --git a/README.md b/README.md
index 8504ba7..fbb9cf6 100644
--- a/README.md
+++ b/README.md
@@ -30,8 +30,10 @@ To run the service in a kubernetes cluster (with hot reloading):
 ### Sample Requests
 To make a request for all competitions:
 ```shell script
-curl -X GET -H "Content-Type: application/json" localhost:8080/calendar
+curl -X GET -H "Content-Type: application/json" localhost:8080/calendar?leagueId=388
 ```
 
+Note that the leagueId can be obtained by inspecting the network requests on the [IFSC Competitions page](https://www.ifsc-climbing.org/index.php/world-competition).
+
 ## License
 This project uses the following license: [MIT](LICENSE.md).
diff --git a/src/main/java/com/jrmcdonald/ifsc/controller/CalendarController.java b/src/main/java/com/jrmcdonald/ifsc/controller/CalendarController.java
index 12e9d03..45d5596 100644
--- a/src/main/java/com/jrmcdonald/ifsc/controller/CalendarController.java
+++ b/src/main/java/com/jrmcdonald/ifsc/controller/CalendarController.java
@@ -5,6 +5,7 @@
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
 import lombok.RequiredArgsConstructor;
@@ -18,8 +19,8 @@ public class CalendarController {
     private final CalendarService calendarService;
 
     @GetMapping(produces = "text/calendar")
-    public Mono<ResponseEntity<String>> getCalendar() {
-        return calendarService.createCalendar().map(ResponseEntity::ok);
+    public Mono<ResponseEntity<String>> getCalendar(@RequestParam("leagueId") String leagueId) {
+        return calendarService.createCalendar(leagueId).map(ResponseEntity::ok);
     }
 
 }
diff --git a/src/main/java/com/jrmcdonald/ifsc/service/calendar/CalendarService.java b/src/main/java/com/jrmcdonald/ifsc/service/calendar/CalendarService.java
index 0712627..574183b 100644
--- a/src/main/java/com/jrmcdonald/ifsc/service/calendar/CalendarService.java
+++ b/src/main/java/com/jrmcdonald/ifsc/service/calendar/CalendarService.java
@@ -3,5 +3,5 @@
 import reactor.core.publisher.Mono;
 
 public interface CalendarService {
-    Mono<String> createCalendar();
+    Mono<String> createCalendar(String leagueId);
 }
diff --git a/src/main/java/com/jrmcdonald/ifsc/service/calendar/InternetCalendarService.java b/src/main/java/com/jrmcdonald/ifsc/service/calendar/InternetCalendarService.java
index bc4766f..bbcf6ce 100644
--- a/src/main/java/com/jrmcdonald/ifsc/service/calendar/InternetCalendarService.java
+++ b/src/main/java/com/jrmcdonald/ifsc/service/calendar/InternetCalendarService.java
@@ -25,8 +25,8 @@ public class InternetCalendarService implements CalendarService {
     private final CompetitionsService competitionsService;
 
     @Override
-    public Mono<String> createCalendar() {
-        return competitionsService.findAll()
+    public Mono<String> createCalendar(String leagueId) {
+        return competitionsService.findAll(leagueId)
                 .flatMap(competitions -> Mono.just(competitions.getEvents()))
                 .flatMap(this::mapEventsToCalendar)
                 .doFinally(calendar -> log.info("Created calendar for all categories"));
diff --git a/src/main/java/com/jrmcdonald/ifsc/service/competitions/CompetitionsService.java b/src/main/java/com/jrmcdonald/ifsc/service/competitions/CompetitionsService.java
index 8f7f605..ef3e975 100644
--- a/src/main/java/com/jrmcdonald/ifsc/service/competitions/CompetitionsService.java
+++ b/src/main/java/com/jrmcdonald/ifsc/service/competitions/CompetitionsService.java
@@ -5,5 +5,5 @@
 import reactor.core.publisher.Mono;
 
 public interface CompetitionsService {
-    Mono<CompetitionList> findAll();
+    Mono<CompetitionList> findAll(String leagueId);
 }
diff --git a/src/main/java/com/jrmcdonald/ifsc/service/competitions/IfscCompetitionsService.java b/src/main/java/com/jrmcdonald/ifsc/service/competitions/IfscCompetitionsService.java
index 4e2db75..c27102c 100644
--- a/src/main/java/com/jrmcdonald/ifsc/service/competitions/IfscCompetitionsService.java
+++ b/src/main/java/com/jrmcdonald/ifsc/service/competitions/IfscCompetitionsService.java
@@ -25,9 +25,12 @@ public IfscCompetitionsService(IfscCompetitionsConfig config) {
     }
 
     @Override
-    public Mono<CompetitionList> findAll() {
+    public Mono<CompetitionList> findAll(String leagueId) {
         return webClient.get()
-                .uri("/results-api.php?api=season_leagues_calendar&league=388")
+                .uri(uriBuilder -> uriBuilder.path("/results-api.php")
+                                             .queryParam("api", "season_leagues_calendar")
+                                             .queryParam("league", leagueId)
+                                             .build())
                 .retrieve()
                 .bodyToMono(CompetitionList.class);
     }
diff --git a/src/test/java/com/jrmcdonald/ifsc/controller/CalendarControllerTest.java b/src/test/java/com/jrmcdonald/ifsc/controller/CalendarControllerTest.java
index 8bbba10..2633f92 100644
--- a/src/test/java/com/jrmcdonald/ifsc/controller/CalendarControllerTest.java
+++ b/src/test/java/com/jrmcdonald/ifsc/controller/CalendarControllerTest.java
@@ -43,10 +43,10 @@ void afterEach() {
     void shouldExecuteService() {
         String expectedValue = "ICALENDAR_VALUE";
 
-        when(calendarService.createCalendar()).thenReturn(Mono.just(expectedValue));
+        when(calendarService.createCalendar("388")).thenReturn(Mono.just(expectedValue));
 
         FluxExchangeResult<String> exchangeResult = client.get()
-                .uri("/calendar")
+                .uri("/calendar?leagueId=388")
                 .exchange()
                 .expectHeader()
                 .contentType("text/calendar;charset=UTF-8")
@@ -56,6 +56,6 @@ void shouldExecuteService() {
                     .assertNext(result -> assertThat(result).isEqualTo(expectedValue))
                     .verifyComplete();
 
-        verify(calendarService).createCalendar();
+        verify(calendarService).createCalendar("388");
     }
 }
\ No newline at end of file
diff --git a/src/test/java/com/jrmcdonald/ifsc/functional/FunctionalTest.java b/src/test/java/com/jrmcdonald/ifsc/functional/FunctionalTest.java
index 46405ef..ec0b948 100644
--- a/src/test/java/com/jrmcdonald/ifsc/functional/FunctionalTest.java
+++ b/src/test/java/com/jrmcdonald/ifsc/functional/FunctionalTest.java
@@ -54,7 +54,7 @@ void shouldExecuteSuccessfully(MockWebServerWrapper wrapper) throws IOException
                                 .setBody(Files.readString(Paths.get("src/test/resources/data/ifscResponseInput.json"))));
 
         client.get()
-                .uri("/calendar")
+                .uri("/calendar?leagueId=388")
                 .exchange()
                 .expectHeader()
                 .contentType("text/calendar;charset=UTF-8")
diff --git a/src/test/java/com/jrmcdonald/ifsc/service/calendar/InternetCalendarServiceTest.java b/src/test/java/com/jrmcdonald/ifsc/service/calendar/InternetCalendarServiceTest.java
index 27021ea..ba32cbe 100644
--- a/src/test/java/com/jrmcdonald/ifsc/service/calendar/InternetCalendarServiceTest.java
+++ b/src/test/java/com/jrmcdonald/ifsc/service/calendar/InternetCalendarServiceTest.java
@@ -56,9 +56,9 @@ void shouldCreateCalendar() {
         Competition cliffhanger = new Competition("Cliffhanger", epoch, epoch);
         Competition olympics = new Competition("Olympics", epochPlusOne, epochPlusOne);
 
-        when(competitionsService.findAll()).thenReturn(Mono.just(new CompetitionList(asList(cliffhanger, olympics))));
+        when(competitionsService.findAll("388")).thenReturn(Mono.just(new CompetitionList(asList(cliffhanger, olympics))));
 
-        Mono<String> calendarMono = calendarService.createCalendar();
+        Mono<String> calendarMono = calendarService.createCalendar("388");
 
         StepVerifier.create(calendarMono)
                 .assertNext(calendarString -> {
diff --git a/src/test/java/com/jrmcdonald/ifsc/service/competitions/IfscCompetitionsServiceTest.java b/src/test/java/com/jrmcdonald/ifsc/service/competitions/IfscCompetitionsServiceTest.java
index 3a77638..984f67b 100644
--- a/src/test/java/com/jrmcdonald/ifsc/service/competitions/IfscCompetitionsServiceTest.java
+++ b/src/test/java/com/jrmcdonald/ifsc/service/competitions/IfscCompetitionsServiceTest.java
@@ -56,7 +56,7 @@ void shouldReturnCompetitions() throws Exception {
                         .setHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
                         .setBody(Files.readString(Paths.get("src/test/resources/data/ifscResponseInput.json"))));
 
-        StepVerifier.create(service.findAll())
+        StepVerifier.create(service.findAll("388"))
                 .assertNext(competitionList -> {
                     assertThat(competitionList.getEvents()).hasSize(3);