diff --git a/public/plans/json/higdon_senior_mara.json b/public/plans/json/higdon_senior_mara.json
new file mode 100644
index 0000000..270d369
--- /dev/null
+++ b/public/plans/json/higdon_senior_mara.json
@@ -0,0 +1,233 @@
+{
+   "id": "higdon_senior_mara",
+   "name": "Hal Higdon: Senior Marathon",
+   "description": "Hal Higdon: Senior: \"The Senior program is a special schedule designed for experienced runners, who want to keep their weekly mileage relatively low.\"",
+   "units": "mi",
+   "source": "https://www.halhigdon.com/training-programs/marathon-training/senior/",
+   "type": "Marathon",
+   "schedule": [
+      {
+         "workouts": [
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{4:6.4} pace",
+               "distance": 4
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "{8:12.9} easy",
+               "distance": 8
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{12:19.3} easy",
+               "distance": 12
+            }
+         ]
+      },
+      {
+         "workouts": [
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{6:9.7} easy pace",
+               "distance": 6
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "{6:9.7} easy",
+               "distance": 6
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{14:22.5} easy",
+               "distance": 14
+            }
+         ]
+      },
+      {
+         "workouts": [
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{4:6.4} pace",
+               "distance": 4
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "{8:12.9} easy",
+               "distance": 8
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{12:19.3} easy",
+               "distance": 12
+            }
+         ]
+      },
+      {
+         "workouts": [
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{6:9.7} easy pace",
+               "distance": 6
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "{6:9.7} easy",
+               "distance": 6
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{16:25.8} easy",
+               "distance": 16
+            }
+         ]
+      },
+      {
+         "workouts": [
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{4:6.4} pace",
+               "distance": 4
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "{10:16.1} easy",
+               "distance": 10
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{12:19.3} easy",
+               "distance": 12
+            }
+         ]
+      },
+      {
+         "workouts": [
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{6:9.7} easy pace",
+               "distance": 6
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "{6:9.7} easy",
+               "distance": 6
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{20:32.1} easy",
+               "distance": 20
+            }
+         ]
+      },
+      {
+         "workouts": [
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{4:6.4} pace",
+               "distance": 4
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "{8:12.9} easy",
+               "distance": 8
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{12:19.3} easy",
+               "distance": 12
+            }
+         ]
+      },
+      {
+         "workouts": [
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "{6:9.7} easy pace",
+               "distance": 6
+            },
+            {
+               "title": "Stretch & strengthen"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "Rest"
+            },
+            {
+               "title": "Marathon ({26.2:42.2})",
+               "distance": 26.2
+            }
+         ]
+      }
+   ]
+}
\ No newline at end of file
diff --git a/public/plans/yaml/higdon_senior_mara.yaml b/public/plans/yaml/higdon_senior_mara.yaml
new file mode 100644
index 0000000..357b343
--- /dev/null
+++ b/public/plans/yaml/higdon_senior_mara.yaml
@@ -0,0 +1,94 @@
+id: higdon_senior_mara
+name: 'Hal Higdon: Senior Marathon'
+description: 'Hal Higdon: Senior: "The Senior program is a special schedule designed for experienced runners, who want to keep their weekly mileage relatively low."'
+units: 'mi'
+source: https://www.halhigdon.com/training-programs/marathon-training/senior/
+type: Marathon
+schedule:
+- workouts: # week 1
+  - title: Rest
+  - title: '{4:6.4} pace'
+    distance: 4
+  - title: Stretch & strengthen
+  - title: '{8:12.9} easy'
+    distance: 8
+  - title: Stretch & strengthen
+  - title: Rest
+  - title: '{12:19.3} easy'
+    distance: 12
+- workouts: # week 2
+  - title: Rest
+  - title: '{6:9.7} easy pace'
+    distance: 6
+  - title: Stretch & strengthen
+  - title: '{6:9.7} easy'
+    distance: 6
+  - title: Stretch & strengthen
+  - title: Rest
+  - title: '{14:22.5} easy'
+    distance: 14
+- workouts: # week 3
+  - title: Rest
+  - title: '{4:6.4} pace'
+    distance: 4
+  - title: Stretch & strengthen
+  - title: '{8:12.9} easy'
+    distance: 8
+  - title: Stretch & strengthen
+  - title: Rest
+  - title: '{12:19.3} easy'
+    distance: 12
+- workouts: # week 4
+  - title: Rest
+  - title: '{6:9.7} easy pace'
+    distance: 6
+  - title: Stretch & strengthen
+  - title: '{6:9.7} easy'
+    distance: 6
+  - title: Stretch & strengthen
+  - title: Rest
+  - title: '{16:25.8} easy'
+    distance: 16
+- workouts: # week 5
+  - title: Rest
+  - title: '{4:6.4} pace'
+    distance: 4
+  - title: Stretch & strengthen
+  - title: '{10:16.1} easy'
+    distance: 10
+  - title: Stretch & strengthen
+  - title: Rest
+  - title: '{12:19.3} easy'
+    distance: 12
+- workouts: # week 6
+  - title: Rest
+  - title: '{6:9.7} easy pace'
+    distance: 6
+  - title: Stretch & strengthen
+  - title: '{6:9.7} easy'
+    distance: 6
+  - title: Stretch & strengthen
+  - title: Rest
+  - title: '{20:32.1} easy'
+    distance: 20
+- workouts: # week 7
+  - title: Rest
+  - title: '{4:6.4} pace'
+    distance: 4
+  - title: Stretch & strengthen
+  - title: '{8:12.9} easy'
+    distance: 8
+  - title: Stretch & strengthen
+  - title: Rest
+  - title: '{12:19.3} easy'
+    distance: 12
+- workouts: # week 8
+  - title: Rest
+  - title: '{6:9.7} easy pace'
+    distance: 6
+  - title: Stretch & strengthen
+  - title: Rest
+  - title: Rest
+  - title: Rest
+  - title: Marathon ({26.2:42.2})
+    distance: 26.2
diff --git a/src/ch/planList.ts b/src/ch/planList.ts
index 16665a6..7dbae1c 100644
--- a/src/ch/planList.ts
+++ b/src/ch/planList.ts
@@ -38,6 +38,7 @@ export const plans: PlanSummary[] = [
   ["higdon_nov_mara1", "Hal Higdon: Novice 1", "Marathon"],
   ["higdon_nov_mara2", "Hal Higdon: Novice 2", "Marathon"],
   ["higdon_mara3", "Hal Higdon: Marathon 3", "Marathon"],
+  ["higdon_senior_mara", "Hal Higdon: Senior Marathon", "Marathon"],
   ["higdon_half3", "Hal Higdon: Half Marathon 3", "Half Marathon"],
   [
     "higdon_int_half1",