diff --git a/GW2SDK.Tests/Features/Guilds/GuildLog.cs b/GW2SDK.Tests/Features/Guilds/GuildLog.cs
index 9c95b74bb..35b44fc2f 100644
--- a/GW2SDK.Tests/Features/Guilds/GuildLog.cs
+++ b/GW2SDK.Tests/Features/Guilds/GuildLog.cs
@@ -36,6 +36,19 @@ public async Task Can_be_found()
                         case InfluenceActivity influenceActivity:
                             Assert.True(influenceActivity.Activity.IsDefined());
                             break;
+                        case GuildMission guildMissionActivity:
+                            Assert.True(guildMissionActivity.State.IsDefined());
+                            if (guildMissionActivity.State == GuildMissionState.Start)
+                            {
+                                Assert.NotEmpty(guildMissionActivity.User);
+                            }
+                            else
+                            {
+                                Assert.Empty(guildMissionActivity.User);
+                            }
+
+                            Assert.Equal(0, guildMissionActivity.Influence);
+                            break;
                     }
                 }
             );
diff --git a/GW2SDK/Features/Guilds/Logs/GuildLogEntryJson.cs b/GW2SDK/Features/Guilds/Logs/GuildLogEntryJson.cs
index 2eddc8964..a3902ab55 100644
--- a/GW2SDK/Features/Guilds/Logs/GuildLogEntryJson.cs
+++ b/GW2SDK/Features/Guilds/Logs/GuildLogEntryJson.cs
@@ -21,6 +21,8 @@ public static GuildLogEntry GetGuildLogEntry(this JsonElement json)
                     return json.GetMemberJoined();
                 case "kick":
                     return json.GetMemberKicked();
+                case "mission":
+                    return json.GetGuildMission();
                 case "motd":
                     return json.GetNewMessageOfTheDay();
                 case "rank_change":
diff --git a/GW2SDK/Features/Guilds/Logs/GuildMission.cs b/GW2SDK/Features/Guilds/Logs/GuildMission.cs
new file mode 100644
index 000000000..2485ad96c
--- /dev/null
+++ b/GW2SDK/Features/Guilds/Logs/GuildMission.cs
@@ -0,0 +1,17 @@
+namespace GuildWars2.Guilds.Logs;
+
+/// <summary>A log entry about a started or ended guild mission.</summary>
+[PublicAPI]
+[DataTransferObject]
+public sealed record GuildMission : GuildLogEntry
+{
+    /// <summary>The ID of the user who started the mission.</summary>
+    /// <remarks>Can be empty.</remarks>
+    public required string User { get; init; }
+
+    /// <summary>The state to which the mission transitioned.</summary>
+    public required Extensible<GuildMissionState> State { get; init; }
+
+    /// <summary>The amount of guild influence awarded.</summary>
+    public required int Influence { get; init; }
+}
diff --git a/GW2SDK/Features/Guilds/Logs/GuildMissionJson.cs b/GW2SDK/Features/Guilds/Logs/GuildMissionJson.cs
new file mode 100644
index 000000000..f92679494
--- /dev/null
+++ b/GW2SDK/Features/Guilds/Logs/GuildMissionJson.cs
@@ -0,0 +1,60 @@
+using System.Text.Json;
+using GuildWars2.Json;
+
+namespace GuildWars2.Guilds.Logs;
+
+internal static class GuildMissionJson
+{
+    public static GuildMission GetGuildMission(this JsonElement json)
+    {
+        RequiredMember id = "id";
+        RequiredMember time = "time";
+        RequiredMember state = "state";
+        RequiredMember influence = "influence";
+        OptionalMember user = "user";
+
+        foreach (var member in json.EnumerateObject())
+        {
+            if (member.NameEquals("type"))
+            {
+                if (!member.Value.ValueEquals("mission"))
+                {
+                    ThrowHelper.ThrowInvalidDiscriminator(member.Value.GetString());
+                }
+            }
+            else if (id.Match(member))
+            {
+                id = member;
+            }
+            else if (time.Match(member))
+            {
+                time = member;
+            }
+            else if (state.Match(member))
+            {
+                state = member;
+            }
+            else if (influence.Match(member))
+            {
+                influence = member;
+            }
+            else if (user.Match(member))
+            {
+                user = member;
+            }
+            else if (JsonOptions.MissingMemberBehavior == MissingMemberBehavior.Error)
+            {
+                ThrowHelper.ThrowUnexpectedMember(member.Name);
+            }
+        }
+
+        return new GuildMission
+        {
+            Id = id.Map(static value => value.GetInt32()),
+            Time = time.Map(static value => value.GetDateTimeOffset()),
+            User = user.Map(static value => value.GetString()) ?? "",
+            State = state.Map(static value => value.GetEnum<GuildMissionState>()),
+            Influence = influence.Map(static value => value.GetInt32())
+        };
+    }
+}
diff --git a/GW2SDK/Features/Guilds/Logs/GuildMissionState.cs b/GW2SDK/Features/Guilds/Logs/GuildMissionState.cs
new file mode 100644
index 000000000..ac1a390fd
--- /dev/null
+++ b/GW2SDK/Features/Guilds/Logs/GuildMissionState.cs
@@ -0,0 +1,15 @@
+namespace GuildWars2.Guilds.Logs;
+
+/// <summary>The guild mission state transitions.</summary>
+[PublicAPI]
+public enum GuildMissionState
+{
+    /// <summary>Logged when the mission starts.</summary>
+    Start = 1,
+
+    /// <summary>Logged when the mission ends successfully.</summary>
+    Success,
+
+    /// <summary>Logged when the mission ends unsuccessfully.</summary>
+    Fail
+}