Boston Marathon logo
BOSTON MARATHON 2024

Chih Ming Chang

Bib: 13966•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 25550
Gender (Male)
#0 / 14578
Masters (Masters Men)
#0 / 9729
Division (M50-54)
#0 / 1935
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
7:31/mi
23:20
↑ 97↓ 3451.5%
10K· 6.21 mi
7:38/mi
47:02
↑ 79↓ 1380.4%
15K· 9.32 mi
7:40/mi
1:10:50
↑ 67↓ 78
20K· 12.43 mi
7:46/mi
1:34:57
↑ 106↓ 860.1%
Half· 13.11 mi
7:46/mi
1:40:15
↑ 19↓ 370.5%
25K· 15.53 mi
7:56/mi
1:59:29
↑ 66↓ 880.2%
30K· 18.64 mi
8:27/mi
2:25:44
↑ 181↓ 1480.2%
20M
8:37/mi
2:37:26
↑ 64↓ 500.2%
21M
11:52/mi
2:49:18
↑ 106↓ 241.6%
35K· 21.75 mi
10:34/mi
2:57:12
↑ 17↓ 861.7%
23M
11:02/mi
3:11:01
↑ 23↓ 630.6%
24M
11:19/mi
3:22:20
↓ 821.3%
40K· 24.85 mi
11:22/mi
3:32:03
↓ 200.3%
25.2M
13:03/mi
3:36:33
↑ 13↓ 160.2%
Finish· 26.22 mi
10:57/mi
3:47:43
↑ 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
Time1:40:15
Pace7:39 /mi
2nd Half
Distance13.11 mi
Time2:07:28
Pace9:43 /mi
📊Positive Split: 27.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:1723:207:3123:20
7:31
-
10K
6.21 mi11:16:5947:027:3423:42
7:38
+0:07
15K
9.32 mi11:40:471:10:507:3623:48
7:40
+0:02
20K
12.43 mi12:04:541:34:577:3824:07
7:46
+0:06
Half
13.11 mi12:10:121:40:157:395:18
7:46
0:00
25K
15.53 mi12:29:261:59:297:4119:14
7:56
+0:10
30K
18.64 mi12:55:412:25:447:4926:15
8:27
+0:31
20M
20.00 mi13:07:232:37:267:5211:42
8:37
+0:10
21M
21.00 mi13:19:152:49:188:0411:52
11:52
+3:15
35K
21.75 mi13:27:092:57:128:097:54
10:34
-1:18
23M
23.00 mi13:40:583:11:018:1813:49
11:02
+0:28
24M
24.00 mi13:52:173:22:208:2611:19
11:19
+0:17
40K
24.85 mi14:02:003:32:038:329:43
11:22
+0:03
25.2M
25.20 mi14:06:303:36:338:364:30
13:03
+1:41
Finish
26.22 mi14:17:403:47:438:4111:10
10:57
-2:06

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

7:31 /mi

Average Pace

8:41 /mi

Slowest Pace

13:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:10:50

31% of race

Time at Steady Pace

1:26:36

38% of race

Time at Slower Pace

1:10:17

31% of race

Average Pace: 8:41 /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 mi10:53:1723:207:3123:20
7:31
#10824
10K
6.21 mi11:16:5947:027:3423:42
7:38
#11054
15K
9.32 mi11:40:471:10:507:3623:48
7:40
#10945
20K
12.43 mi12:04:541:34:577:3824:07
7:46
#10703
Half
13.11 mi12:10:121:40:157:395:18
7:46
#10716
25K
15.53 mi12:29:261:59:297:4119:14
7:56
#10469
30K
18.64 mi12:55:412:25:447:4926:15
8:27
#10375
20M
20.00 mi13:07:232:37:267:5211:42
8:37
#10303
21M
21.00 mi13:19:152:49:188:0411:52
11:52
#11038
35K
21.75 mi13:27:092:57:128:097:54
10:34
#11492
23M
23.00 mi13:40:583:11:018:1813:49
11:02
#12127
24M
24.00 mi13:52:173:22:208:2611:19
11:19
#12695
40K
24.85 mi14:02:003:32:038:329:43
11:22
#13101
25.2M
25.20 mi14:06:303:36:338:364:30
13:03
#13287
Finish
26.22 mi14:17:403:47:438:4111:10
10:57
#13774
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi108248325832510886(Top 43%)8226(Top 56%)8226(Top 425%)
10K6.21 mi3.10 mi11054-2308381-568381-5611261(Top 44%)8434(Top 58%)8434(Top 436%)
15K9.32 mi3.11 mi10945+1098311+708311+7010886(Top 43%)8226(Top 56%)8226(Top 425%)
20K12.43 mi3.11 mi10703+2428172+1398172+13910126(Top 40%)7711(Top 53%)7711(Top 399%)
Half13.11 mi0.68 mi10716-138168+48168+411012(Top 43%)8157(Top 56%)8157(Top 422%)
25K15.53 mi2.42 mi10469+2477998+1707998+1709735(Top 38%)7354(Top 50%)7354(Top 380%)
30K18.64 mi3.11 mi10375+947839+1597839+15910370(Top 41%)7464(Top 51%)7464(Top 386%)
20M20.00 mi1.36 mi10303+727746+937746+9310024(Top 39%)7028(Top 48%)7028(Top 363%)
21M21.00 mi1.00 mi11038-7358061-3158061-31518498(Top 72%)10875(Top 75%)10875(Top 562%)
35K21.75 mi0.75 mi11492-4548242-1818242-18118712(Top 73%)10977(Top 75%)10977(Top 567%)
23M23.00 mi1.25 mi12127-6358454-2128454-21218510(Top 72%)10809(Top 74%)10809(Top 559%)
24M24.00 mi1.00 mi12695-5688659-2058659-20520009(Top 78%)11522(Top 79%)11522(Top 595%)
40K24.85 mi0.85 mi13101-4068793-1348793-13418993(Top 74%)10941(Top 75%)10941(Top 565%)
25.2M25.20 mi0.35 mi13287-1868866-738866-7319766(Top 77%)11312(Top 78%)11312(Top 585%)
Finish26.22 mi1.02 mi13774-4879048-1829048-18221220(Top 83%)12092(Top 83%)12092(Top 625%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21story building
+97ft-345ft

Overall

10886

Males

8226

M50-54

8226

5K→10K

3.1 - 6.2 mi

Top 44%
×5story building
+79ft-138ft

Overall

11261

Males

8434

M50-54

8434

10K→15K

6.2 - 9.3 mi

Top 43%
×3story building
+67ft-78ft

Overall

10886

Males

8226

M50-54

8226

15K→20K

9.3 - 12.4 mi

Top 40%
×5story building
+106ft-86ft

Overall

10126

Males

7711

M50-54

7711

20K→Half

12.4 - 13.1 mi

Top 43%
×2story building
+19ft-37ft

Overall

11012

Males

8157

M50-54

8157

Half→25K

13.1 - 15.5 mi

Top 38%
×4story building
+66ft-88ft

Overall

9735

Males

7354

M50-54

7354

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

10370

Males

7464

M50-54

7464

30K→20M

18.6 - 20.0 mi

Top 39%
×5story building
+64ft-50ft

Overall

10024

Males

7028

M50-54

7028

20M→21M

20.0 - 21.0 mi

Top 72%
×8story building
+106ft-24ft

Overall

18498

Males

10875

M50-54

10875

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

18712

Males

10977

M50-54

10977

35K→23M

21.8 - 23.0 mi

Top 72%
×5story building
+23ft-63ft

Overall

18510

Males

10809

M50-54

10809

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

20009

Males

11522

M50-54

11522

24M→40K

24.0 - 24.9 mi

Top 74%
×1story
+6ft-20ft

Overall

18993

Males

10941

M50-54

10941

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

19766

Males

11312

M50-54

11312

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

21220

Males

12092

M50-54

12092

Passing Analysis

Category:
Athletes Passed
1849
Passed By
4797
Net Change
-2950
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10824
5K → 10K200430-230#10824#11054
10K → 15K259150+109#11054#10945
15K → 20K33896+242#10945#10703
20K → Half4154-13#10703#10716
Half → 25K34396+247#10716#10469
25K → 30K328233+94#10469#10375
30K → 20M177104+72#10375#10303
20M → 21M21756-735#10303#11038
21M → 35K18472-454#11038#11492
35K → 23M40675-635#11492#12127
23M → 24M22590-568#12127#12695
24M → 40K28434-406#12695#13101
40K → 25.2M12198-186#13101#13287
25.2M → Finish22509-487#13287#13774
TOTALS18494797-2950
📊

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