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BOSTON MARATHON 2023

Alvin Low

Bib: 30226•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M40-44)
#0 / 2241
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
9:05/mi
28:13
↑ 97↓ 3451.5%
10K· 6.21 mi
8:58/mi
56:04
↑ 79↓ 1380.4%
15K· 9.32 mi
8:37/mi
1:22:51
↑ 67↓ 78
20K· 12.43 mi
8:34/mi
1:49:29
↑ 106↓ 860.1%
Half· 13.11 mi
8:36/mi
1:55:21
↑ 19↓ 370.5%
25K· 15.53 mi
8:47/mi
2:16:38
↑ 66↓ 880.2%
30K· 18.64 mi
9:03/mi
2:44:45
↑ 181↓ 1480.2%
20M
8:54/mi
2:56:51
↑ 64↓ 500.2%
21M
9:35/mi
3:06:26
↑ 106↓ 241.6%
35K· 21.75 mi
9:29/mi
3:13:32
↑ 17↓ 861.7%
23M
9:17/mi
3:25:10
↑ 23↓ 630.6%
24M
8:51/mi
3:34:01
↓ 821.3%
40K· 24.85 mi
8:45/mi
3:41:30
↓ 200.3%
25.2M
9:02/mi
3:44:37
↑ 13↓ 160.2%
Finish· 26.22 mi
7:41/mi
3:52:27
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:21
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time1:57:06
Pace8:56 /mi
📊Positive Split: 1.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:1228:139:0528:13
9:05
-
10K
6.21 mi12:21:0356:049:0127:51
8:58
-0:07
15K
9.32 mi12:47:501:22:518:5326:47
8:37
-0:21
20K
12.43 mi13:14:281:49:298:4926:38
8:34
-0:03
Half
13.11 mi13:20:201:55:218:485:52
8:36
+0:02
25K
15.53 mi13:41:372:16:388:4821:17
8:47
+0:11
30K
18.64 mi14:09:442:44:458:5028:07
9:03
+0:16
20M
20.00 mi14:21:502:56:518:5112:06
8:54
-0:09
21M
21.00 mi14:31:253:06:268:539:35
9:35
+0:41
35K
21.75 mi14:38:313:13:328:547:06
9:29
-0:06
23M
23.00 mi14:50:093:25:108:5511:38
9:17
-0:12
24M
24.00 mi14:59:003:34:018:558:51
8:51
-0:26
40K
24.85 mi15:06:293:41:308:557:29
8:45
-0:06
25.2M
25.20 mi15:09:363:44:378:553:07
9:02
+0:17
Finish
26.22 mi15:17:263:52:278:527:50
7:41
-1:21

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

7:41 /mi

Average Pace

8:52 /mi

Slowest Pace

9:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:07:07

29% of race

Time at Steady Pace

2:17:01

59% of race

Time at Slower Pace

28:19

12% of race

Average Pace: 8:52 /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 mi11:53:1228:139:0528:13
9:05
#20791
10K
6.21 mi12:21:0356:049:0127:51
8:58
#20726
15K
9.32 mi12:47:501:22:518:5326:47
8:37
#20065
20K
12.43 mi13:14:281:49:298:4926:38
8:34
#19370
Half
13.11 mi13:20:201:55:218:485:52
8:36
#19313
25K
15.53 mi13:41:372:16:388:4821:17
8:47
#19055
30K
18.64 mi14:09:442:44:458:5028:07
9:03
#18780
20M
20.00 mi14:21:502:56:518:5112:06
8:54
#18565
21M
21.00 mi14:31:253:06:268:539:35
9:35
#18413
35K
21.75 mi14:38:313:13:328:547:06
9:29
#18484
23M
23.00 mi14:50:093:25:108:5511:38
9:17
#18409
24M
24.00 mi14:59:003:34:018:558:51
8:51
#18323
40K
24.85 mi15:06:293:41:308:557:29
8:45
#18209
25.2M
25.20 mi15:09:363:44:378:553:07
9:02
#18140
Finish
26.22 mi15:17:263:52:278:527:50
7:41
#17868
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi20791125031250318559(Top 70%)11699(Top 77%)11699(Top 522%)
10K6.21 mi3.10 mi20726+6512547-4412547-4420725(Top 78%)12597(Top 83%)12597(Top 562%)
15K9.32 mi3.11 mi20065+66112267+28012267+28018559(Top 70%)11699(Top 77%)11699(Top 522%)
20K12.43 mi3.11 mi19370+69511997+27011997+27017303(Top 65%)11174(Top 74%)11174(Top 499%)
Half13.11 mi0.68 mi19313+5711980+1711980+1718290(Top 69%)11609(Top 76%)11609(Top 518%)
25K15.53 mi2.42 mi19055+25811884+9611884+9617814(Top 67%)11327(Top 75%)11327(Top 505%)
30K18.64 mi3.11 mi18780+27511742+14211742+14217431(Top 65%)11095(Top 73%)11095(Top 495%)
20M20.00 mi1.36 mi18565+21511635+10711635+10716026(Top 60%)10424(Top 69%)10424(Top 465%)
21M21.00 mi1.00 mi18413+15211558+7711558+7716343(Top 61%)10505(Top 69%)10505(Top 469%)
35K21.75 mi0.75 mi18484-7111584-2611584-2619797(Top 74%)11957(Top 79%)11957(Top 534%)
23M23.00 mi1.25 mi18409+7511531+5311531+5317467(Top 66%)10900(Top 72%)10900(Top 486%)
24M24.00 mi1.00 mi18323+8611487+4411487+4416482(Top 62%)10397(Top 69%)10397(Top 464%)
40K24.85 mi0.85 mi18209+11411426+6111426+6114814(Top 56%)9613(Top 63%)9613(Top 429%)
25.2M25.20 mi0.35 mi18140+6911394+3211394+3212733(Top 48%)8646(Top 57%)8646(Top 386%)
Finish26.22 mi1.02 mi17868+27211278+11611278+1169894(Top 37%)7239(Top 48%)7239(Top 323%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

18559

Males

11699

M40-44

11699

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

20725

Males

12597

M40-44

12597

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

18559

Males

11699

M40-44

11699

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

17303

Males

11174

M40-44

11174

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

18290

Males

11609

M40-44

11609

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17814

Males

11327

M40-44

11327

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

17431

Males

11095

M40-44

11095

30K→20M

18.6 - 20.0 mi

Top 60%
×5story building
+64ft-50ft

Overall

16026

Males

10424

M40-44

10424

20M→21M

20.0 - 21.0 mi

Top 61%
×8story building
+106ft-24ft

Overall

16343

Males

10505

M40-44

10505

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

19797

Males

11957

M40-44

11957

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

17467

Males

10900

M40-44

10900

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

16482

Males

10397

M40-44

10397

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

14814

Males

9613

M40-44

9613

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

12733

Males

8646

M40-44

8646

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2story building
+22ft-21ft

Overall

9894

Males

7239

M40-44

7239

Passing Analysis

Category:
Athletes Passed
3475
Passed By
552
Net Change
+2923
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20791
5K → 10K340275+65#20791#20726
10K → 15K67514+661#20726#20065
15K → 20K6983+695#20065#19370
20K → Half636+57#19370#19313
Half → 25K27315+258#19313#19055
25K → 30K31944+275#19055#18780
30K → 20M2238+215#18780#18565
20M → 21M17523+152#18565#18413
21M → 35K2899-71#18413#18484
35K → 23M11742+75#18484#18409
23M → 24M9913+86#18409#18323
24M → 40K1239+114#18323#18209
40K → 25.2M690+69#18209#18140
25.2M → Finish2731+272#18140#17868
TOTALS3475552+2923
📊

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