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BOSTON MARATHON 2024

Bo-Kuai Lai

Bib: 12193•M

OH

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Top 43%
Gender (Male)
#0 / 14578
Masters (Masters Men)
#0 / 9729
Top 45%
Division (M50-54)
#0 / 1935
Top 48%
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
7:28/mi
23:13
↑ 97↓ 3451.5%
10K· 6.21 mi
7:34/mi
46:42
↑ 79↓ 1380.4%
15K· 9.32 mi
7:36/mi
1:10:19
↑ 67↓ 78
20K· 12.43 mi
7:41/mi
1:34:10
↑ 106↓ 860.1%
Half· 13.11 mi
7:48/mi
1:39:29
↑ 19↓ 370.5%
25K· 15.53 mi
7:41/mi
1:58:06
↑ 66↓ 880.2%
30K· 18.64 mi
8:08/mi
2:23:21
↑ 181↓ 1480.2%
20M
8:28/mi
2:34:51
↑ 64↓ 500.2%
21M
9:33/mi
2:44:24
↑ 106↓ 241.6%
35K· 21.75 mi
9:24/mi
2:51:26
↑ 17↓ 861.7%
23M
10:16/mi
3:04:17
↑ 23↓ 630.6%
24M
10:12/mi
3:14:29
↓ 821.3%
40K· 24.85 mi
10:01/mi
3:23:03
↓ 200.3%
25.2M
10:58/mi
3:26:50
↑ 13↓ 160.2%
Finish· 26.22 mi
9:22/mi
3:36:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:29
Pace7:35 /mi
2nd Half
Distance13.11 mi
Time1:56:54
Pace8:55 /mi
📊Positive Split: 17.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:2423:137:2823:13
7:28
-
10K
6.21 mi11:15:5346:427:3123:29
7:34
+0:06
15K
9.32 mi11:39:301:10:197:3323:37
7:36
+0:02
20K
12.43 mi12:03:211:34:107:3523:51
7:41
+0:05
Half
13.11 mi12:08:401:39:297:355:19
7:48
+0:07
25K
15.53 mi12:27:171:58:067:3618:37
7:41
-0:07
30K
18.64 mi12:52:322:23:217:4125:15
8:08
+0:27
20M
20.00 mi13:04:022:34:517:4511:30
8:28
+0:20
21M
21.00 mi13:13:352:44:247:509:33
9:33
+1:05
35K
21.75 mi13:20:372:51:267:537:02
9:24
-0:09
23M
23.00 mi13:33:283:04:178:0112:51
10:16
+0:52
24M
24.00 mi13:43:403:14:298:0610:12
10:12
-0:04
40K
24.85 mi13:52:143:23:038:108:34
10:01
-0:11
25.2M
25.20 mi13:56:013:26:508:123:47
10:58
+0:57
Finish
26.22 mi14:05:343:36:238:169:33
9:22
-1:36

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

7:28 /mi

Average Pace

8:16 /mi

Slowest Pace

10:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:06

55% of race

Time at Steady Pace

36:45

17% of race

Time at Slower Pace

1:01:32

28% of race

Average Pace: 8:15 /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 mi10:52:2423:137:2823:13
7:28
#10514
10K
6.21 mi11:15:5346:427:3123:29
7:34
#10611
15K
9.32 mi11:39:301:10:197:3323:37
7:36
#10537
20K
12.43 mi12:03:211:34:107:3523:51
7:41
#10224
Half
13.11 mi12:08:401:39:297:355:19
7:48
#10269
25K
15.53 mi12:27:171:58:067:3618:37
7:41
#9814
30K
18.64 mi12:52:322:23:217:4125:15
8:08
#9471
20M
20.00 mi13:04:022:34:517:4511:30
8:28
#9380
21M
21.00 mi13:13:352:44:247:509:33
9:33
#9436
35K
21.75 mi13:20:372:51:267:537:02
9:24
#9675
23M
23.00 mi13:33:283:04:178:0112:51
10:16
#10204
24M
24.00 mi13:43:403:14:298:0610:12
10:12
#10597
40K
24.85 mi13:52:143:23:038:108:34
10:01
#10808
25.2M
25.20 mi13:56:013:26:508:123:47
10:58
#10882
Finish
26.22 mi14:05:343:36:238:169:33
9:22
#11078
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi105148202820210423(Top 41%)8010(Top 55%)8010(Top 414%)
10K6.21 mi3.10 mi10611-978199+38199+310753(Top 42%)8223(Top 56%)8223(Top 425%)
15K9.32 mi3.11 mi10537+748138+618138+6110423(Top 41%)8010(Top 55%)8010(Top 414%)
20K12.43 mi3.11 mi10224+3137932+2067932+2069581(Top 37%)7448(Top 51%)7448(Top 385%)
Half13.11 mi0.68 mi10269-457940-87940-811227(Top 44%)8274(Top 57%)8274(Top 428%)
25K15.53 mi2.42 mi9814+4557665+2757665+2758144(Top 32%)6512(Top 45%)6512(Top 337%)
30K18.64 mi3.11 mi9471+3437403+2627403+2628598(Top 34%)6561(Top 45%)6561(Top 339%)
20M20.00 mi1.36 mi9380+917308+957308+959237(Top 36%)6645(Top 46%)6645(Top 343%)
21M21.00 mi1.00 mi9436-567259+497259+4911055(Top 43%)7258(Top 50%)7258(Top 375%)
35K21.75 mi0.75 mi9675-2397349-907349-9015086(Top 59%)9168(Top 63%)9168(Top 474%)
23M23.00 mi1.25 mi10204-5297557-2087557-20816305(Top 64%)9718(Top 67%)9718(Top 502%)
24M24.00 mi1.00 mi10597-3937703-1467703-14616941(Top 66%)9976(Top 68%)9976(Top 516%)
40K24.85 mi0.85 mi10808-2117754-517754-5115042(Top 59%)8970(Top 62%)8970(Top 464%)
25.2M25.20 mi0.35 mi10882-747763-97763-914344(Top 56%)8581(Top 59%)8581(Top 443%)
Finish26.22 mi1.02 mi11078-1967809-467809-4615913(Top 62%)9403(Top 65%)9403(Top 486%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

10423

Males

8010

M50-54

8010

5K→10K

3.1 - 6.2 mi

Top 42%
×5story building
+79ft-138ft

Overall

10753

Males

8223

M50-54

8223

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

10423

Males

8010

M50-54

8010

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

9581

Males

7448

M50-54

7448

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

11227

Males

8274

M50-54

8274

Half→25K

13.1 - 15.5 mi

Top 32%
×4story building
+66ft-88ft

Overall

8144

Males

6512

M50-54

6512

25K→30K

15.5 - 18.6 mi

Top 34%
×9story building
+181ft-148ft

Overall

8598

Males

6561

M50-54

6561

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

9237

Males

6645

M50-54

6645

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

11055

Males

7258

M50-54

7258

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

15086

Males

9168

M50-54

9168

35K→23M

21.8 - 23.0 mi

Top 64%
×5story building
+23ft-63ft

Overall

16305

Males

9718

M50-54

9718

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

16941

Males

9976

M50-54

9976

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15042

Males

8970

M50-54

8970

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

14344

Males

8581

M50-54

8581

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

15913

Males

9403

M50-54

9403

Passing Analysis

Category:
Athletes Passed
2325*
Passed By
2887
Net Change
-564
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10514
5K → 10K238335-97#10514#10611
10K → 15K246172+74#10611#10537
15K → 20K39077+313#10537#10224
20K → Half2570-45#10224#10269
Half → 25K473*18+455#10269#9814
25K → 30K43289+343#9814#9471
30K → 20M18392+91#9471#9380
20M → 21M116172-56#9380#9436
21M → 35K30269-239#9436#9675
35K → 23M41568-529#9675#10204
23M → 24M39432-393#10204#10597
24M → 40K49260-211#10597#10808
40K → 25.2M2599-74#10808#10882
25.2M → Finish38234-196#10882#11078
TOTALS2325*2887-564

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

📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing