Boston Marathon logo
BOSTON MARATHON 2024

Kassi Harmon

Bib: 159•F

UT

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 25550
Top 3%
Gender (Female)
#0 / 10924
Top 0.4%
Masters (Masters Women)
#0 / 6263
Top 0.1%
Division (F40-44)
#0 / 1613
Top 0.3%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:57
Rank: #1252
Start → 5K
18:57 | 6:06/mi
10K· 6.21 mi
38:08
Rank: #1327 (-75)
5K → 10K
19:11 | 6:10/mi
15K· 9.32 mi
57:29
Rank: #1361 (-34)
10K → 15K
19:21 | 6:14/mi
20K· 12.43 mi
1:17:00
Rank: #1316 (+45)
15K → 20K
19:31 | 6:17/mi
Half· 13.11 mi
1:21:13
Rank: #1310 (+6)
20K → Half
4:13 | 6:11/mi
25K· 15.53 mi
1:36:33
Rank: #1261 (+49)
Half → 25K
15:20 | 6:19/mi
30K· 18.64 mi
1:56:34
Rank: #1147 (+114)
25K → 30K
20:01 | 6:27/mi
20M
2:05:25
Rank: #1080 (+67)
30K → 20M
8:51 | 6:31/mi
21M
2:12:20
Rank: #1038 (+42)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:17:01
Rank: #1012 (+26)
21M → 35K
4:41 | 6:16/mi
23M
2:25:18
Rank: #977 (+35)
35K → 23M
8:17 | 6:37/mi
24M
2:31:43
Rank: #942 (+35)
23M → 24M
6:25 | 6:25/mi
40K· 24.85 mi
2:37:23
Rank: #913 (+29)
24M → 40K
5:40 | 6:38/mi
25.2M
2:39:55
Rank: #902 (+11)
40K → 25.2M
2:32 | 7:21/mi
Finish· 26.22 mi
2:46:32
Rank: #895 (+7)
25.2M → Finish
6:37 | 6:30/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
Time1:21:13
Pace6:12 /mi
2nd Half
Distance13.11 mi
Time1:25:19
Pace6:30 /mi
📊Positive Split: 5.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:05:5818:576:0618:57
6:06
-
10K
6.21 mi10:25:0938:086:0819:11
6:10
+0:04
15K
9.32 mi10:44:3057:296:1019:21
6:14
+0:04
20K
12.43 mi11:04:011:17:006:1219:31
6:17
+0:03
Half
13.11 mi11:08:141:21:136:124:13
6:11
-0:06
25K
15.53 mi11:23:341:36:336:1315:20
6:19
+0:08
30K
18.64 mi11:43:351:56:346:1520:01
6:27
+0:08
20M
20.00 mi11:52:262:05:256:168:51
6:31
+0:04
21M
21.00 mi11:59:212:12:206:186:55
6:55
+0:24
35K
21.75 mi12:04:022:17:016:184:41
6:16
-0:39
23M
23.00 mi12:12:192:25:186:198:17
6:37
+0:21
24M
24.00 mi12:18:442:31:436:196:25
6:25
-0:12
40K
24.85 mi12:24:242:37:236:205:40
6:38
+0:13
25.2M
25.20 mi12:26:562:39:556:212:32
7:21
+0:43
Finish
26.22 mi12:33:332:46:326:216:37
6:30
-0:51

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

6:06 /mi

Average Pace

6:21 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:01:42

37% of race

Time at Steady Pace

1:21:26

49% of race

Time at Slower Pace

23:24

14% of race

Average Pace: 6:21 /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 mi10:05:5818:576:0618:57
6:06
#1252
10K
6.21 mi10:25:0938:086:0819:11
6:10
#1327
15K
9.32 mi10:44:3057:296:1019:21
6:14
#1361
20K
12.43 mi11:04:011:17:006:1219:31
6:17
#1316
Half
13.11 mi11:08:141:21:136:124:13
6:11
#1310
25K
15.53 mi11:23:341:36:336:1315:20
6:19
#1261
30K
18.64 mi11:43:351:56:346:1520:01
6:27
#1147
20M
20.00 mi11:52:262:05:256:168:51
6:31
#1080
21M
21.00 mi11:59:212:12:206:186:55
6:55
#1038
35K
21.75 mi12:04:022:17:016:184:41
6:16
#1012
23M
23.00 mi12:12:192:25:186:198:17
6:37
#977
24M
24.00 mi12:18:442:31:436:196:25
6:25
#942
40K
24.85 mi12:24:242:37:236:205:40
6:38
#913
25.2M
25.20 mi12:26:562:39:556:212:32
7:21
#902
Finish
26.22 mi12:33:332:46:326:216:37
6:30
#895
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi125238381482(Top 6%)44(Top 0.4%)44(Top 3%)
10K6.21 mi3.10 mi1327-7538381425(Top 6%)42(Top 0.4%)42(Top 3%)
15K9.32 mi3.11 mi1361-3438381482(Top 6%)44(Top 0.4%)44(Top 3%)
20K12.43 mi3.11 mi1316+4539-139-11309(Top 5%)39(Top 0.4%)39(Top 2%)
Half13.11 mi0.68 mi1310+640-140-11298(Top 5%)37(Top 0.3%)37(Top 2%)
25K15.53 mi2.42 mi1261+4940401214(Top 5%)39(Top 0.4%)39(Top 2%)
30K18.64 mi3.11 mi1147+11437+337+3912(Top 4%)39(Top 0.4%)39(Top 2%)
20M20.00 mi1.36 mi1080+6736+136+1880(Top 3%)43(Top 0.4%)43(Top 3%)
21M21.00 mi1.00 mi1038+4238-238-2922(Top 4%)46(Top 0.4%)46(Top 3%)
35K21.75 mi0.75 mi1012+263838764(Top 3%)39(Top 0.4%)39(Top 2%)
23M23.00 mi1.25 mi977+353838910(Top 4%)45(Top 0.4%)45(Top 3%)
24M24.00 mi1.00 mi942+3539-139-1815(Top 3%)45(Top 0.4%)45(Top 3%)
40K24.85 mi0.85 mi913+293939967(Top 4%)66(Top 0.6%)66(Top 4%)
25.2M25.20 mi0.35 mi902+1139391153(Top 5%)86(Top 0.8%)86(Top 5%)
Finish26.22 mi1.02 mi895+740-140-11394(Top 5%)119(Top 1%)119(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 6%
×21stories
+97ft-345ft

Overall

1482

Females

44

F40-44

44

5K→10K

3.1 - 6.2 mi

Top 6%
×5stories
+79ft-138ft

Overall

1425

Females

42

F40-44

42

10K→15K

6.2 - 9.3 mi

Top 6%
×3stories
+67ft-78ft

Overall

1482

Females

44

F40-44

44

15K→20K

9.3 - 12.4 mi

Top 5%
×5stories
+106ft-86ft

Overall

1309

Females

39

F40-44

39

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1298

Females

37

F40-44

37

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1214

Females

39

F40-44

39

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

912

Females

39

F40-44

39

30K→20M

18.6 - 20.0 mi

Top 3%
×5stories
+64ft-50ft

Overall

880

Females

43

F40-44

43

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

922

Females

46

F40-44

46

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

764

Females

39

F40-44

39

35K→23M

21.8 - 23.0 mi

Top 4%
×5stories
+23ft-63ft

Overall

910

Females

45

F40-44

45

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

815

Females

45

F40-44

45

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

967

Females

66

F40-44

66

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1153

Females

86

F40-44

86

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1394

Females

119

F40-44

119

Passing Analysis

Category:
Athletes Passed
698
Passed By
341
Net Change
+357
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1252
5K → 10K38113-75#1252#1327
10K → 15K4781-34#1327#1361
15K → 20K7631+45#1361#1316
20K → Half148+6#1316#1310
Half → 25K7627+49#1310#1261
25K → 30K13016+114#1261#1147
30K → 20M758+67#1147#1080
20M → 21M5311+42#1080#1038
21M → 35K282+26#1038#1012
35K → 23M449+35#1012#977
23M → 24M449+35#977#942
24M → 40K367+29#942#913
40K → 25.2M143+11#913#902
25.2M → Finish2316+7#902#895
TOTALS698341+357
📊

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