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BOSTON MARATHON 2023

Jeffrey Krebs

CA

Bib: 12444 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 33%
Gender (Male)
#0 / 15176
Top 48%
Masters (Masters Men)
#0 / 9891
Top 36%
Division (M60-64)
#0 / 1110
Top 7%
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:33/mi
23:26
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:17/mi
46:03
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:18/mi
1:08:43
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:21/mi
1:31:33
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:21/mi
1:36:34
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:34/mi
1:54:55
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:46/mi
2:19:04
↑ 181↓ 1480.2%
138 ft elev
20M
7:51/mi
2:29:44
↑ 64↓ 500.2%
148 ft elev
21M
8:23/mi
2:38:07
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:55/mi
2:44:02
↑ 17↓ 861.7%
156 ft elev
23M
7:53/mi
2:53:54
↑ 23↓ 630.6%
116 ft elev
24M
7:43/mi
3:01:37
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:55/mi
3:08:23
↓ 200.3%
20 ft elev
25.2M
8:33/mi
3:11:20
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:35/mi
3:19:04
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:36:347:22 /mi⚡ faster
2nd Half
1:42:307:49 /mi+6.1%
Positive split — 6.1% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:2823:267:3323:26
7:33
-
10K
6.21 mi11:15:0546:037:2522:37
7:17
-0:16
15K
9.32 mi11:37:451:08:437:2222:40
7:18
+0:01
20K
12.43 mi12:00:351:31:337:2222:50
7:21
+0:03
Half
13.11 mi12:05:361:36:347:225:01
7:21
0:00
25K
15.53 mi12:23:571:54:557:2418:21
7:34
+0:13
30K
18.64 mi12:48:062:19:047:2824:09
7:46
+0:12
20M
20.00 mi12:58:462:29:447:2910:40
7:51
+0:05
21M
21.00 mi13:07:092:38:077:328:23
8:23
+0:32
35K
21.75 mi13:13:042:44:027:335:55
7:55
-0:28
23M
23.00 mi13:22:562:53:547:349:52
7:53
-0:02
24M
24.00 mi13:30:393:01:377:347:43
7:43
-0:10
40K
24.85 mi13:37:253:08:237:356:46
7:55
+0:12
25.2M
25.20 mi13:40:223:11:207:362:57
8:33
+0:38
Finish
26.22 mi13:48:063:19:047:367:44
7:35
-0:58

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

7:17 /mi

Average Pace

7:36 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

3:07:44

94% of race

Time at Steady Pace

11:20

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:36 /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 mi10:52:2823:267:3323:26
7:33
#10000
10K
6.21 mi11:15:0546:037:2522:37
7:17
#9259
15K
9.32 mi11:37:451:08:437:2222:40
7:18
#8996
20K
12.43 mi12:00:351:31:337:2222:50
7:21
#8745
Half
13.11 mi12:05:361:36:347:225:01
7:21
#8755
25K
15.53 mi12:23:571:54:557:2418:21
7:34
#8821
30K
18.64 mi12:48:062:19:047:2824:09
7:46
#8831
20M
20.00 mi12:58:462:29:447:2910:40
7:51
#8843
21M
21.00 mi13:07:092:38:077:328:23
8:23
#8879
35K
21.75 mi13:13:042:44:027:335:55
7:55
#8956
23M
23.00 mi13:22:562:53:547:349:52
7:53
#8935
24M
24.00 mi13:30:393:01:377:347:43
7:43
#8921
40K
24.85 mi13:37:253:08:237:356:46
7:55
#8921
25.2M
25.20 mi13:40:223:11:207:362:57
8:33
#8918
Finish
26.22 mi13:48:063:19:047:367:44
7:35
#8907
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi1000081258125851072487248
10K6.21 mi3.10 mi9259+7417730+3957730+395870573887388
15K9.32 mi3.11 mi8996+2637563+1677563+167851072487248
20K12.43 mi3.11 mi8745+2517403+1607403+160813969786978
Half13.11 mi0.68 mi8755-107406-37406-3899975157515
25K15.53 mi2.42 mi8821-667428-227428-22928175967596
30K18.64 mi3.11 mi8831-107404+247404+24914773597359
20M20.00 mi1.36 mi8843-127390+147390+14920073047304
21M21.00 mi1.00 mi8879-367396-67396-6972374557455
35K21.75 mi0.75 mi8956-777422-267422-261140482948294
23M23.00 mi1.25 mi8935+217383+397383+39893169316931
24M24.00 mi1.00 mi8921+147345+387345+38917269756975
40K24.85 mi0.85 mi89217326+197326+19940370307030
25.2M25.20 mi0.35 mi8918+37316+107316+10980171877187
Finish26.22 mi1.02 mi8907+117293+237293+23917668466846

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21story building
+97ft-345ft

Overall

8510

Males

7248

M60-64

7248

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

8705

Males

7388

M60-64

7388

10K→15K

6.2 - 9.3 mi

Top 32%
×3story building
+67ft-78ft

Overall

8510

Males

7248

M60-64

7248

15K→20K

9.3 - 12.4 mi

Top 31%
×5story building
+106ft-86ft

Overall

8139

Males

6978

M60-64

6978

20K→Half

12.4 - 13.1 mi

Top 34%
×2story building
+19ft-37ft

Overall

8999

Males

7515

M60-64

7515

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9281

Males

7596

M60-64

7596

25K→30K

15.5 - 18.6 mi

Top 34%
×9story building
+181ft-148ft

Overall

9147

Males

7359

M60-64

7359

30K→20M

18.6 - 20.0 mi

Top 35%
×5story building
+64ft-50ft

Overall

9200

Males

7304

M60-64

7304

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

9723

Males

7455

M60-64

7455

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

11404

Males

8294

M60-64

8294

35K→23M

21.8 - 23.0 mi

Top 34%
×5story building
+23ft-63ft

Overall

8931

Males

6931

M60-64

6931

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9172

Males

6975

M60-64

6975

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

9403

Males

7030

M60-64

7030

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

9801

Males

7187

M60-64

7187

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2story building
+22ft-21ft

Overall

9176

Males

6846

M60-64

6846

Passing Analysis

Category:
Athletes Passed
2112*
Passed By
1019
Net Change
+1093
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10000
5K → 10K799*58+741#10000#9259
10K → 15K31148+263#9259#8996
15K → 20K27524+251#8996#8745
20K → Half1828-10#8745#8755
Half → 25K80146-66#8755#8821
25K → 30K166176-10#8821#8831
30K → 20M7385-12#8831#8843
20M → 21M65101-36#8843#8879
21M → 35K2299-77#8879#8956
35K → 23M8463+21#8956#8935
23M → 24M7763+14#8935#8921
24M → 40K54540#8921#8921
40K → 25.2M2724+3#8921#8918
25.2M → Finish6150+11#8918#8907
TOTALS2112*1019+1093

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

Passing Charts

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