Boston Marathon logo
BOSTON MARATHON 2023

Margaret Griffing

Bib: 16009•F

AR

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 39%
Masters (Masters Women)
#0 / 6539
Top 25%
Division (F40-44)
#0 / 1878
Top 45%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:31
Rank: #13181
Start → 5K
24:31 | 7:53/mi
10K· 6.21 mi
48:38
Rank: #12958 (+223)
5K → 10K
24:07 | 7:46/mi
15K· 9.32 mi
1:12:56
Rank: #12934 (+24)
10K → 15K
24:18 | 7:49/mi
20K· 12.43 mi
1:37:34
Rank: #12861 (+73)
15K → 20K
24:38 | 7:56/mi
Half· 13.11 mi
1:42:58
Rank: #12917 (-56)
20K → Half
5:24 | 7:55/mi
25K· 15.53 mi
2:02:15
Rank: #12789 (+128)
Half → 25K
19:17 | 7:57/mi
30K· 18.64 mi
2:28:06
Rank: #12860 (-71)
25K → 30K
25:51 | 8:19/mi
20M
2:39:59
Rank: #13052 (-192)
30K → 20M
11:53 | 8:45/mi
21M
2:48:44
Rank: #12941 (+111)
20M → 21M
8:45 | 8:45/mi
35K· 21.75 mi
2:54:50
Rank: #12942 (-1)
21M → 35K
6:06 | 8:09/mi
23M
3:06:01
Rank: #13105 (-163)
35K → 23M
11:11 | 8:56/mi
24M
3:14:58
Rank: #13295 (-190)
23M → 24M
8:57 | 8:57/mi
40K· 24.85 mi
3:23:10
Rank: #13571 (-276)
24M → 40K
8:12 | 9:35/mi
25.2M
3:26:52
Rank: #13734 (-163)
40K → 25.2M
3:42 | 10:44/mi
Finish· 26.22 mi
3:36:57
Rank: #14180 (-446)
25.2M → Finish
10:05 | 9:54/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:58
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:53:59
Pace8:42 /mi
📊Positive Split: 10.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:5424:317:5324:31
7:53
-
10K
6.21 mi11:39:0148:387:5024:07
7:46
-0:07
15K
9.32 mi12:03:191:12:567:4924:18
7:49
+0:03
20K
12.43 mi12:27:571:37:347:5124:38
7:56
+0:07
Half
13.11 mi12:33:211:42:587:515:24
7:55
-0:01
25K
15.53 mi12:52:382:02:157:5219:17
7:57
+0:02
30K
18.64 mi13:18:292:28:067:5725:51
8:19
+0:22
20M
20.00 mi13:30:222:39:598:0011:53
8:45
+0:26
21M
21.00 mi13:39:072:48:448:028:45
8:45
0:00
35K
21.75 mi13:45:132:54:508:026:06
8:09
-0:36
23M
23.00 mi13:56:243:06:018:0511:11
8:56
+0:47
24M
24.00 mi14:05:213:14:588:078:57
8:57
+0:01
40K
24.85 mi14:13:333:23:108:108:12
9:35
+0:38
25.2M
25.20 mi14:17:153:26:528:133:42
10:44
+1:09
Finish
26.22 mi14:27:203:36:578:1710:05
9:54
-0:50

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:46 /mi

Average Pace

8:17 /mi

Slowest Pace

10:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:12:56

34% of race

Time at Steady Pace

1:21:16

37% of race

Time at Slower Pace

1:02:45

29% of race

Average Pace: 8:16 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:14:5424:317:5324:31
7:53
#13181
10K
6.21 mi11:39:0148:387:5024:07
7:46
#12958
15K
9.32 mi12:03:191:12:567:4924:18
7:49
#12934
20K
12.43 mi12:27:571:37:347:5124:38
7:56
#12861
Half
13.11 mi12:33:211:42:587:515:24
7:55
#12917
25K
15.53 mi12:52:382:02:157:5219:17
7:57
#12789
30K
18.64 mi13:18:292:28:067:5725:51
8:19
#12860
20M
20.00 mi13:30:222:39:598:0011:53
8:45
#13052
21M
21.00 mi13:39:072:48:448:028:45
8:45
#12941
35K
21.75 mi13:45:132:54:508:026:06
8:09
#12942
23M
23.00 mi13:56:243:06:018:0511:11
8:56
#13105
24M
24.00 mi14:05:213:14:588:078:57
8:57
#13295
40K
24.85 mi14:13:333:23:108:108:12
9:35
#13571
25.2M
25.20 mi14:17:153:26:528:133:42
10:44
#13734
Finish
26.22 mi14:27:203:36:578:1710:05
9:54
#14180
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi131813545354512927(Top 49%)3434(Top 30%)3434(Top 183%)
10K6.21 mi3.10 mi12958+2233426+1193426+11912812(Top 48%)3324(Top 29%)3324(Top 177%)
15K9.32 mi3.11 mi12934+243419+73419+712927(Top 49%)3434(Top 30%)3434(Top 183%)
20K12.43 mi3.11 mi12861+733402+173402+1712878(Top 48%)3483(Top 30%)3483(Top 185%)
Half13.11 mi0.68 mi12917-563437-353437-3513776(Top 52%)3963(Top 35%)3963(Top 211%)
25K15.53 mi2.42 mi12789+1283391+463391+4612370(Top 46%)3298(Top 29%)3298(Top 176%)
30K18.64 mi3.11 mi12860-713469-783469-7813163(Top 49%)3851(Top 34%)3851(Top 205%)
20M20.00 mi1.36 mi13052-1923598-1293598-12915161(Top 57%)5099(Top 45%)5099(Top 272%)
21M21.00 mi1.00 mi12941+1113554+443554+4411919(Top 45%)3366(Top 29%)3366(Top 179%)
35K21.75 mi0.75 mi12942-13576-223576-2213197(Top 50%)4118(Top 36%)4118(Top 219%)
23M23.00 mi1.25 mi13105-1633684-1083684-10815701(Top 59%)5570(Top 49%)5570(Top 297%)
24M24.00 mi1.00 mi13295-1903812-1283812-12816998(Top 64%)6348(Top 56%)6348(Top 338%)
40K24.85 mi0.85 mi13571-2764003-1914003-19118650(Top 70%)7291(Top 64%)7291(Top 388%)
25.2M25.20 mi0.35 mi13734-1634112-1094112-10919791(Top 74%)7932(Top 69%)7932(Top 422%)
Finish26.22 mi1.02 mi14180-4464412-3004412-30021464(Top 81%)8820(Top 77%)8820(Top 470%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21stories
+97ft-345ft

Overall

12927

Females

3434

F40-44

3434

5K→10K

3.1 - 6.2 mi

Top 48%
×5stories
+79ft-138ft

Overall

12812

Females

3324

F40-44

3324

10K→15K

6.2 - 9.3 mi

Top 49%
×3stories
+67ft-78ft

Overall

12927

Females

3434

F40-44

3434

15K→20K

9.3 - 12.4 mi

Top 48%
×5stories
+106ft-86ft

Overall

12878

Females

3483

F40-44

3483

20K→Half

12.4 - 13.1 mi

Top 52%
×2stories
+19ft-37ft

Overall

13776

Females

3963

F40-44

3963

Half→25K

13.1 - 15.5 mi

Top 46%
×4stories
+66ft-88ft

Overall

12370

Females

3298

F40-44

3298

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

13163

Females

3851

F40-44

3851

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

15161

Females

5099

F40-44

5099

20M→21M

20.0 - 21.0 mi

Top 45%
×8stories
+106ft-24ft

Overall

11919

Females

3366

F40-44

3366

21M→35K

21.0 - 21.8 mi

Top 50%
×7stories
+17ft-86ft

Overall

13197

Females

4118

F40-44

4118

35K→23M

21.8 - 23.0 mi

Top 59%
×5stories
+23ft-63ft

Overall

15701

Females

5570

F40-44

5570

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

16998

Females

6348

F40-44

6348

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

18650

Females

7291

F40-44

7291

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

19791

Females

7932

F40-44

7932

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2stories
+22ft-21ft

Overall

21464

Females

8820

F40-44

8820

Passing Analysis

Category:
Athletes Passed
1602
Passed By
2601
Net Change
-999
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13181
5K → 10K436213+223#13181#12958
10K → 15K211187+24#12958#12934
15K → 20K231158+73#12934#12861
20K → Half2076-56#12861#12917
Half → 25K19466+128#12917#12789
25K → 30K164235-71#12789#12860
30K → 20M48240-192#12860#13052
20M → 21M15645+111#13052#12941
21M → 35K4445-1#12941#12942
35K → 23M51214-163#12942#13105
23M → 24M19209-190#13105#13295
24M → 40K13289-276#13295#13571
40K → 25.2M5168-163#13571#13734
25.2M → Finish10456-446#13734#14180
TOTALS16022601-999
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing