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BOSTON MARATHON 2023

Ka Wah Lee

Bib: 15646•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 35%
Gender (Male)
#0 / 15176
Top 49%
Masters (Masters Men)
#0 / 9891
Top 38%
Division (M50-54)
#0 / 2052
Top 36%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
7:47/mi
24:12
↑ 97↓ 3451.5%
10K· 6.21 mi
7:32/mi
47:35
↑ 79↓ 1380.4%
15K· 9.32 mi
7:31/mi
1:10:55
↑ 67↓ 78
20K· 12.43 mi
7:36/mi
1:34:31
↑ 106↓ 860.1%
Half· 13.11 mi
7:20/mi
1:39:31
↑ 19↓ 370.5%
25K· 15.53 mi
7:37/mi
1:57:58
↑ 66↓ 880.2%
30K· 18.64 mi
7:47/mi
2:22:09
↑ 181↓ 1480.2%
20M
7:41/mi
2:32:35
↑ 64↓ 500.2%
21M
8:07/mi
2:40:42
↑ 106↓ 241.6%
35K· 21.75 mi
7:29/mi
2:46:18
↑ 17↓ 861.7%
23M
7:34/mi
2:55:47
↑ 23↓ 630.6%
24M
7:25/mi
3:03:12
↓ 821.3%
40K· 24.85 mi
7:35/mi
3:09:41
↓ 200.3%
25.2M
8:22/mi
3:12:34
↑ 13↓ 160.2%
Finish· 26.22 mi
7:34/mi
3:20:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:31
Pace7:35 /mi
2nd Half
Distance13.11 mi
Time1:40:46
Pace7:41 /mi
📊Positive Split: 1.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:1124:127:4724:12
7:47
-
10K
6.21 mi11:15:3447:357:3923:23
7:32
-0:15
15K
9.32 mi11:38:541:10:557:3723:20
7:31
-0:01
20K
12.43 mi12:02:301:34:317:3623:36
7:36
+0:05
Half
13.11 mi12:07:301:39:317:355:00
7:20
-0:16
25K
15.53 mi12:25:571:57:587:3618:27
7:37
+0:17
30K
18.64 mi12:50:082:22:097:3824:11
7:47
+0:10
20M
20.00 mi13:00:342:32:357:3810:26
7:41
-0:06
21M
21.00 mi13:08:412:40:427:398:07
8:07
+0:26
35K
21.75 mi13:14:172:46:187:395:36
7:29
-0:38
23M
23.00 mi13:23:462:55:477:399:29
7:34
+0:05
24M
24.00 mi13:31:113:03:127:387:25
7:25
-0:09
40K
24.85 mi13:37:403:09:417:386:29
7:35
+0:10
25.2M
25.20 mi13:40:333:12:347:382:53
8:22
+0:47
Finish
26.22 mi13:48:163:20:177:397:43
7:34
-0:48

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

7:20 /mi

Average Pace

7:39 /mi

Slowest Pace

8:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:09:17

95% of race

Time at Steady Pace

11:00

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:38 /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 mi10:52:1124:127:4724:12
7:47
#12236
10K
6.21 mi11:15:3447:357:3923:23
7:32
#11407
15K
9.32 mi11:38:541:10:557:3723:20
7:31
#10994
20K
12.43 mi12:02:301:34:317:3623:36
7:36
#10757
Half
13.11 mi12:07:301:39:317:355:00
7:20
#10646
25K
15.53 mi12:25:571:57:587:3618:27
7:37
#10435
30K
18.64 mi12:50:082:22:097:3824:11
7:47
#10169
20M
20.00 mi13:00:342:32:357:3810:26
7:41
#9969
21M
21.00 mi13:08:412:40:427:398:07
8:07
#9821
35K
21.75 mi13:14:172:46:187:395:36
7:29
#9762
23M
23.00 mi13:23:462:55:477:399:29
7:34
#9548
24M
24.00 mi13:31:113:03:127:387:25
7:25
#9420
40K
24.85 mi13:37:403:09:417:386:29
7:35
#9301
25.2M
25.20 mi13:40:333:12:347:382:53
8:22
#9284
Finish
26.22 mi13:48:163:20:177:397:43
7:34
#9274
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi122369217921710245(Top 38%)8270(Top 54%)8270(Top 403%)
10K6.21 mi3.10 mi11407+8298838+3798838+37910654(Top 40%)8508(Top 56%)8508(Top 415%)
15K9.32 mi3.11 mi10994+4138648+1908648+19010245(Top 38%)8270(Top 54%)8270(Top 403%)
20K12.43 mi3.11 mi10757+2378520+1288520+12810054(Top 38%)8100(Top 53%)8100(Top 395%)
Half13.11 mi0.68 mi10646+1118478+428478+428803(Top 33%)7394(Top 49%)7394(Top 360%)
25K15.53 mi2.42 mi10435+2118356+1228356+1229601(Top 36%)7761(Top 51%)7761(Top 378%)
30K18.64 mi3.11 mi10169+2668180+1768180+1769227(Top 35%)7410(Top 49%)7410(Top 361%)
20M20.00 mi1.36 mi9969+2008050+1308050+1308019(Top 30%)6609(Top 44%)6609(Top 322%)
21M21.00 mi1.00 mi9821+1487946+1047946+1048109(Top 30%)6545(Top 43%)6545(Top 319%)
35K21.75 mi0.75 mi9762+597898+487898+488439(Top 32%)6770(Top 45%)6770(Top 330%)
23M23.00 mi1.25 mi9548+2147750+1487750+1486917(Top 26%)5782(Top 38%)5782(Top 282%)
24M24.00 mi1.00 mi9420+1287640+1107640+1107167(Top 27%)5817(Top 38%)5817(Top 283%)
40K24.85 mi0.85 mi9301+1197542+987542+987214(Top 27%)5762(Top 38%)5762(Top 281%)
25.2M25.20 mi0.35 mi9284+177521+217521+218634(Top 32%)6535(Top 43%)6535(Top 318%)
Finish26.22 mi1.02 mi9274+107498+237498+239074(Top 34%)6791(Top 45%)6791(Top 331%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10245

Males

8270

M50-54

8270

5K→10K

3.1 - 6.2 mi

Top 40%
×5story building
+79ft-138ft

Overall

10654

Males

8508

M50-54

8508

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10245

Males

8270

M50-54

8270

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10054

Males

8100

M50-54

8100

20K→Half

12.4 - 13.1 mi

Top 33%
×2story building
+19ft-37ft

Overall

8803

Males

7394

M50-54

7394

Half→25K

13.1 - 15.5 mi

Top 36%
×4story building
+66ft-88ft

Overall

9601

Males

7761

M50-54

7761

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

9227

Males

7410

M50-54

7410

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

8019

Males

6609

M50-54

6609

20M→21M

20.0 - 21.0 mi

Top 30%
×8story building
+106ft-24ft

Overall

8109

Males

6545

M50-54

6545

21M→35K

21.0 - 21.8 mi

Top 32%
×7story building
+17ft-86ft

Overall

8439

Males

6770

M50-54

6770

35K→23M

21.8 - 23.0 mi

Top 26%
×5story building
+23ft-63ft

Overall

6917

Males

5782

M50-54

5782

23M→24M

23.0 - 24.0 mi

Top 27%
×6story building
+12ft-82ft

Overall

7167

Males

5817

M50-54

5817

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7214

Males

5762

M50-54

5762

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

8634

Males

6535

M50-54

6535

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2story building
+22ft-21ft

Overall

9074

Males

6791

M50-54

6791

Passing Analysis

Category:
Athletes Passed
3364*
Passed By
402
Net Change
+2962
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12236
5K → 10K90071+829#12236#11407
10K → 15K46047+413#11407#10994
15K → 20K29154+237#10994#10757
20K → Half1143+111#10757#10646
Half → 25K24231+211#10646#10435
25K → 30K304*38+266#10435#10169
30K → 20M214*14+200#10169#9969
20M → 21M16315+148#9969#9821
21M → 35K7516+59#9821#9762
35K → 23M22511+214#9762#9548
23M → 24M14416+128#9548#9420
24M → 40K13718+119#9420#9301
40K → 25.2M3215+17#9301#9284
25.2M → Finish6353+10#9284#9274
TOTALS3364*402+2962

* 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