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BOSTON MARATHON 2023

Geoffrey Lew

Bib: 12876•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 47%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:43
Rank: #10846
Start → 5K
23:43 | 7:38/mi
10K· 6.21 mi
46:26
Rank: #9769 (+1077)
5K → 10K
22:43 | 7:19/mi
15K· 9.32 mi
1:09:58
Rank: #10122 (-353)
10K → 15K
23:32 | 7:34/mi
20K· 12.43 mi
1:33:45
Rank: #10231 (-109)
15K → 20K
23:47 | 7:39/mi
Half· 13.11 mi
1:38:56
Rank: #10255 (-24)
20K → Half
5:11 | 7:36/mi
25K· 15.53 mi
1:58:09
Rank: #10530 (-275)
Half → 25K
19:13 | 7:56/mi
30K· 18.64 mi
2:24:44
Rank: #11283 (-753)
25K → 30K
26:35 | 8:33/mi
20M
2:36:49
Rank: #11718 (-435)
30K → 20M
12:05 | 8:54/mi
21M
2:46:20
Rank: #12029 (-311)
20M → 21M
9:31 | 9:31/mi
35K· 21.75 mi
2:52:41
Rank: #12156 (-127)
21M → 35K
6:21 | 8:29/mi
23M
3:03:51
Rank: #12399 (-243)
35K → 23M
11:10 | 8:55/mi
24M
3:12:34
Rank: #12562 (-163)
23M → 24M
8:43 | 8:43/mi
40K· 24.85 mi
3:19:57
Rank: #12627 (-65)
24M → 40K
7:23 | 8:38/mi
25.2M
3:23:03
Rank: #12628 (-1)
40K → 25.2M
3:06 | 8:59/mi
Finish· 26.22 mi
3:31:03
Rank: #12552 (+76)
25.2M → Finish
8:00 | 7:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:56
Pace7:33 /mi
2nd Half
Distance13.11 mi
Time1:52:07
Pace8:33 /mi
📊Positive Split: 13.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:1923:437:3823:43
7:38
-
10K
6.21 mi11:14:0246:267:2822:43
7:19
-0:19
15K
9.32 mi11:37:341:09:587:3023:32
7:34
+0:15
20K
12.43 mi12:01:211:33:457:3323:47
7:39
+0:05
Half
13.11 mi12:06:321:38:567:335:11
7:36
-0:03
25K
15.53 mi12:25:451:58:097:3619:13
7:56
+0:20
30K
18.64 mi12:52:202:24:447:4626:35
8:33
+0:37
20M
20.00 mi13:04:252:36:497:5012:05
8:54
+0:21
21M
21.00 mi13:13:562:46:207:559:31
9:31
+0:37
35K
21.75 mi13:20:172:52:417:566:21
8:29
-1:02
23M
23.00 mi13:31:273:03:518:0011:10
8:55
+0:26
24M
24.00 mi13:40:103:12:348:018:43
8:43
-0:12
40K
24.85 mi13:47:333:19:578:037:23
8:38
-0:05
25.2M
25.20 mi13:50:393:23:038:033:06
8:59
+0:21
Finish
26.22 mi13:58:393:31:038:038:00
7:51
-1:08

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

7:19 /mi

Average Pace

8:03 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:09

60% of race

Time at Steady Pace

49:02

23% of race

Time at Slower Pace

35:52

17% of race

Average Pace: 8:03 /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 mi10:51:1923:437:3823:43
7:38
#10846
10K
6.21 mi11:14:0246:267:2822:43
7:19
#9769
15K
9.32 mi11:37:341:09:587:3023:32
7:34
#10122
20K
12.43 mi12:01:211:33:457:3323:47
7:39
#10231
Half
13.11 mi12:06:321:38:567:335:11
7:36
#10255
25K
15.53 mi12:25:451:58:097:3619:13
7:56
#10530
30K
18.64 mi12:52:202:24:447:4626:35
8:33
#11283
20M
20.00 mi13:04:252:36:497:5012:05
8:54
#11718
21M
21.00 mi13:13:562:46:207:559:31
9:31
#12029
35K
21.75 mi13:20:172:52:417:566:21
8:29
#12156
23M
23.00 mi13:31:273:03:518:0011:10
8:55
#12399
24M
24.00 mi13:40:103:12:348:018:43
8:43
#12562
40K
24.85 mi13:47:333:19:578:037:23
8:38
#12627
25.2M
25.20 mi13:50:393:23:038:033:06
8:59
#12628
Finish
26.22 mi13:58:393:31:038:038:00
7:51
#12552
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi108468588858810792(Top 41%)8550(Top 56%)8550(Top 380%)
10K6.21 mi3.10 mi9769+10778028+5608028+5608929(Top 34%)7539(Top 50%)7539(Top 335%)
15K9.32 mi3.11 mi10122-3538237-2098237-20910792(Top 41%)8550(Top 56%)8550(Top 380%)
20K12.43 mi3.11 mi10231-1098277-408277-4010556(Top 40%)8370(Top 55%)8370(Top 372%)
Half13.11 mi0.68 mi10255-248288-118288-1110982(Top 41%)8621(Top 57%)8621(Top 383%)
25K15.53 mi2.42 mi10530-2758407-1198407-11912093(Top 45%)8945(Top 59%)8945(Top 397%)
30K18.64 mi3.11 mi11283-7538688-2818688-28114638(Top 55%)9902(Top 65%)9902(Top 440%)
20M20.00 mi1.36 mi11718-4358868-1808868-18015943(Top 60%)10379(Top 68%)10379(Top 461%)
21M21.00 mi1.00 mi12029-3118987-1198987-11916002(Top 60%)10345(Top 68%)10345(Top 459%)
35K21.75 mi0.75 mi12156-1279019-329019-3215194(Top 57%)9940(Top 65%)9940(Top 441%)
23M23.00 mi1.25 mi12399-2439106-879106-8715609(Top 59%)10067(Top 66%)10067(Top 447%)
24M24.00 mi1.00 mi12562-1639156-509156-5015721(Top 59%)10044(Top 66%)10044(Top 446%)
40K24.85 mi0.85 mi12627-659164-89164-814135(Top 53%)9293(Top 61%)9293(Top 413%)
25.2M25.20 mi0.35 mi12628-19151+139151+1312403(Top 47%)8466(Top 56%)8466(Top 376%)
Finish26.22 mi1.02 mi12552+769095+569095+5611030(Top 41%)7806(Top 51%)7806(Top 347%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21stories
+97ft-345ft

Overall

10792

Males

8550

M45-49

8550

5K→10K

3.1 - 6.2 mi

Top 34%
×5stories
+79ft-138ft

Overall

8929

Males

7539

M45-49

7539

10K→15K

6.2 - 9.3 mi

Top 41%
×3stories
+67ft-78ft

Overall

10792

Males

8550

M45-49

8550

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

10556

Males

8370

M45-49

8370

20K→Half

12.4 - 13.1 mi

Top 41%
×2stories
+19ft-37ft

Overall

10982

Males

8621

M45-49

8621

Half→25K

13.1 - 15.5 mi

Top 45%
×4stories
+66ft-88ft

Overall

12093

Males

8945

M45-49

8945

25K→30K

15.5 - 18.6 mi

Top 55%
×9stories
+181ft-148ft

Overall

14638

Males

9902

M45-49

9902

30K→20M

18.6 - 20.0 mi

Top 60%
×5stories
+64ft-50ft

Overall

15943

Males

10379

M45-49

10379

20M→21M

20.0 - 21.0 mi

Top 60%
×8stories
+106ft-24ft

Overall

16002

Males

10345

M45-49

10345

21M→35K

21.0 - 21.8 mi

Top 57%
×7stories
+17ft-86ft

Overall

15194

Males

9940

M45-49

9940

35K→23M

21.8 - 23.0 mi

Top 59%
×5stories
+23ft-63ft

Overall

15609

Males

10067

M45-49

10067

23M→24M

23.0 - 24.0 mi

Top 59%
×6stories
+12ft-82ft

Overall

15721

Males

10044

M45-49

10044

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14135

Males

9293

M45-49

9293

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

12403

Males

8466

M45-49

8466

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2stories
+22ft-21ft

Overall

11030

Males

7806

M45-49

7806

Passing Analysis

Category:
Athletes Passed
1737*
Passed By
3441
Net Change
-1706
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10846
5K → 10K1101*24+1077#10846#9769
10K → 15K79430-353#9769#10122
15K → 20K121*230-109#10122#10231
20K → Half2044-24#10231#10255
Half → 25K67342-275#10255#10530
25K → 30K48801-753#10530#11283
30K → 20M22457-435#11283#11718
20M → 21M18329-311#11718#12029
21M → 35K20147-127#12029#12156
35K → 23M32275-243#12156#12399
23M → 24M30193-163#12399#12562
24M → 40K40105-65#12562#12627
40K → 25.2M2930-1#12627#12628
25.2M → Finish11034+76#12628#12552
TOTALS1737*3441-1706

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

📊

Passing Visuals

Category:
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🔥Passing Intensity

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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