Boston Marathon logo
BOSTON MARATHON 2024

Chih Ming Kao

Bib: 20383•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 25550
Top 42%
Gender (Male)
#0 / 14578
Masters (Masters Men)
#0 / 9729
Top 44%
Division (M60-64)
#0 / 1173
Top 14%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:39/mi
23:45
↑ 97↓ 3451.5%
10K· 6.21 mi
7:45/mi
47:50
↑ 79↓ 1380.4%
15K· 9.32 mi
8:07/mi
1:13:04
↑ 67↓ 78
20K· 12.43 mi
8:04/mi
1:38:07
↑ 106↓ 860.1%
Half· 13.11 mi
8:33/mi
1:43:57
↑ 19↓ 370.5%
25K· 15.53 mi
7:58/mi
2:03:16
↑ 66↓ 880.2%
30K· 18.64 mi
8:13/mi
2:28:47
↑ 181↓ 1480.2%
20M
8:14/mi
2:39:58
↑ 64↓ 500.2%
21M
8:58/mi
2:48:56
↑ 106↓ 241.6%
35K· 21.75 mi
8:12/mi
2:55:04
↑ 17↓ 861.7%
23M
8:19/mi
3:05:29
↑ 23↓ 630.6%
24M
8:10/mi
3:13:39
↓ 821.3%
40K· 24.85 mi
8:29/mi
3:20:54
↓ 200.3%
25.2M
10:58/mi
3:24:41
↑ 13↓ 160.2%
Finish· 26.22 mi
9:59/mi
3:34:51
↑ 22↓ 21

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
Time1:43:57
Pace7:56 /mi
2nd Half
Distance13.11 mi
Time1:50:54
Pace8:28 /mi
📊Positive Split: 6.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:0823:457:3923:45
7:39
-
10K
6.21 mi11:46:1347:507:4224:05
7:45
+0:06
15K
9.32 mi12:11:271:13:047:5025:14
8:07
+0:22
20K
12.43 mi12:36:301:38:077:5425:03
8:04
-0:03
Half
13.11 mi12:42:201:43:577:565:50
8:33
+0:29
25K
15.53 mi13:01:392:03:167:5619:19
7:58
-0:35
30K
18.64 mi13:27:102:28:477:5925:31
8:13
+0:15
20M
20.00 mi13:38:212:39:588:0011:11
8:14
+0:01
21M
21.00 mi13:47:192:48:568:038:58
8:58
+0:44
35K
21.75 mi13:53:272:55:048:036:08
8:12
-0:46
23M
23.00 mi14:03:523:05:298:0410:25
8:19
+0:07
24M
24.00 mi14:12:023:13:398:048:10
8:10
-0:09
40K
24.85 mi14:19:173:20:548:057:15
8:29
+0:19
25.2M
25.20 mi14:23:043:24:418:073:47
10:58
+2:29
Finish
26.22 mi14:33:143:34:518:1210:10
9:59
-0:59

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

7:39 /mi

Average Pace

8:12 /mi

Slowest Pace

10:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

47:50

22% of race

Time at Steady Pace

2:24:06

67% of race

Time at Slower Pace

22:55

11% of race

Average Pace: 8:12 /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 mi11:22:0823:457:3923:45
7:39
#11864
10K
6.21 mi11:46:1347:507:4224:05
7:45
#12071
15K
9.32 mi12:11:271:13:047:5025:14
8:07
#12833
20K
12.43 mi12:36:301:38:077:5425:03
8:04
#12614
Half
13.11 mi12:42:201:43:577:565:50
8:33
#12821
25K
15.53 mi13:01:392:03:167:5619:19
7:58
#12233
30K
18.64 mi13:27:102:28:477:5925:31
8:13
#11524
20M
20.00 mi13:38:212:39:588:0011:11
8:14
#11170
21M
21.00 mi13:47:192:48:568:038:58
8:58
#10900
35K
21.75 mi13:53:272:55:048:036:08
8:12
#10796
23M
23.00 mi14:03:523:05:298:0410:25
8:19
#10530
24M
24.00 mi14:12:023:13:398:048:10
8:10
#10348
40K
24.85 mi14:19:173:20:548:057:15
8:29
#10250
25.2M
25.20 mi14:23:043:24:418:073:47
10:58
#10338
Finish
26.22 mi14:33:143:34:518:1210:10
9:59
#10723
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi118648784878414218(Top 56%)9679(Top 66%)9679(Top 825%)
10K6.21 mi3.10 mi12071-2078833-498833-4912239(Top 48%)8894(Top 61%)8894(Top 758%)
15K9.32 mi3.11 mi12833-7629144-3119144-31114218(Top 56%)9679(Top 66%)9679(Top 825%)
20K12.43 mi3.11 mi12614+2199034+1109034+11012244(Top 48%)8763(Top 60%)8763(Top 747%)
Half13.11 mi0.68 mi12821-2079109-759109-7515950(Top 62%)10299(Top 71%)10299(Top 878%)
25K15.53 mi2.42 mi12233+5888812+2978812+2979969(Top 39%)7478(Top 51%)7478(Top 638%)
30K18.64 mi3.11 mi11524+7098398+4148398+4149067(Top 35%)6806(Top 47%)6806(Top 580%)
20M20.00 mi1.36 mi11170+3548178+2208178+2207993(Top 31%)6003(Top 41%)6003(Top 512%)
21M21.00 mi1.00 mi10900+2707989+1897989+1898424(Top 33%)6007(Top 41%)6007(Top 512%)
35K21.75 mi0.75 mi10796+1047904+857904+858957(Top 35%)6241(Top 43%)6241(Top 532%)
23M23.00 mi1.25 mi10530+2667707+1977707+1977465(Top 29%)5331(Top 37%)5331(Top 454%)
24M24.00 mi1.00 mi10348+1827567+1407567+1407551(Top 30%)5272(Top 36%)5272(Top 449%)
40K24.85 mi0.85 mi10250+987484+837484+838235(Top 32%)5526(Top 38%)5526(Top 471%)
25.2M25.20 mi0.35 mi10338-887510-267510-2614342(Top 56%)8579(Top 59%)8579(Top 731%)
Finish26.22 mi1.02 mi10723-3857643-1337643-13318279(Top 72%)10600(Top 73%)10600(Top 904%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

14218

Males

9679

M60-64

9679

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

12239

Males

8894

M60-64

8894

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

14218

Males

9679

M60-64

9679

15K→20K

9.3 - 12.4 mi

Top 48%
×5story building
+106ft-86ft

Overall

12244

Males

8763

M60-64

8763

20K→Half

12.4 - 13.1 mi

Top 62%
×2story building
+19ft-37ft

Overall

15950

Males

10299

M60-64

10299

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

9969

Males

7478

M60-64

7478

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

9067

Males

6806

M60-64

6806

30K→20M

18.6 - 20.0 mi

Top 31%
×5story building
+64ft-50ft

Overall

7993

Males

6003

M60-64

6003

20M→21M

20.0 - 21.0 mi

Top 33%
×8story building
+106ft-24ft

Overall

8424

Males

6007

M60-64

6007

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

8957

Males

6241

M60-64

6241

35K→23M

21.8 - 23.0 mi

Top 29%
×5story building
+23ft-63ft

Overall

7465

Males

5331

M60-64

5331

23M→24M

23.0 - 24.0 mi

Top 30%
×6story building
+12ft-82ft

Overall

7551

Males

5272

M60-64

5272

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

8235

Males

5526

M60-64

5526

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

14342

Males

8579

M60-64

8579

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

18279

Males

10600

M60-64

10600

Passing Analysis

Category:
Athletes Passed
3424*
Passed By
2283
Net Change
+1141
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11864
5K → 10K200407-207#11864#12071
10K → 15K62824-762#12071#12833
15K → 20K358139+219#12833#12614
20K → Half16223-207#12614#12821
Half → 25K5979+588#12821#12233
25K → 30K72920+709#12233#11524
30K → 20M36915+354#11524#11170
20M → 21M29929+270#11170#10900
21M → 35K12723+104#10900#10796
35K → 23M28923+266#10796#10530
23M → 24M19917+182#10530#10348
24M → 40K130*32+98#10348#10250
40K → 25.2M23111-88#10250#10338
25.2M → Finish26411-385#10338#10723
TOTALS3424*2283+1141

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing