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BOSTON MARATHON 2023

Stefan Altenbach

Bib: 11437•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 45%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 50%
Division (M50-54)
#0 / 2052
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
7:34/mi
23:29
↑ 97↓ 3451.5%
10K· 6.21 mi
7:36/mi
47:07
↑ 79↓ 1380.4%
15K· 9.32 mi
7:37/mi
1:10:46
↑ 67↓ 78
20K· 12.43 mi
8:07/mi
1:35:59
↑ 106↓ 860.1%
Half· 13.11 mi
7:40/mi
1:41:13
↑ 19↓ 370.5%
25K· 15.53 mi
7:44/mi
1:59:59
↑ 66↓ 880.2%
30K· 18.64 mi
8:00/mi
2:24:51
↑ 181↓ 1480.2%
20M
8:01/mi
2:35:45
↑ 64↓ 500.2%
21M
8:24/mi
2:44:09
↑ 106↓ 241.6%
35K· 21.75 mi
8:12/mi
2:50:17
↑ 17↓ 861.7%
23M
8:32/mi
3:00:58
↑ 23↓ 630.6%
24M
8:34/mi
3:09:32
↓ 821.3%
40K· 24.85 mi
8:57/mi
3:17:11
↓ 200.3%
25.2M
9:34/mi
3:20:29
↑ 13↓ 160.2%
Finish· 26.22 mi
8:38/mi
3:29:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:13
Pace7:43 /mi
2nd Half
Distance13.11 mi
Time1:48:04
Pace8:15 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:1323:297:3423:29
7:34
-
10K
6.21 mi11:13:5147:077:3523:38
7:36
+0:02
15K
9.32 mi11:37:301:10:467:3623:39
7:37
+0:01
20K
12.43 mi12:02:431:35:597:4325:13
8:07
+0:30
Half
13.11 mi12:07:571:41:137:435:14
7:40
-0:27
25K
15.53 mi12:26:431:59:597:4318:46
7:44
+0:04
30K
18.64 mi12:51:352:24:517:4624:52
8:00
+0:16
20M
20.00 mi13:02:292:35:457:4710:54
8:01
+0:01
21M
21.00 mi13:10:532:44:097:498:24
8:24
+0:23
35K
21.75 mi13:17:012:50:177:506:08
8:12
-0:12
23M
23.00 mi13:27:423:00:587:5210:41
8:32
+0:20
24M
24.00 mi13:36:163:09:327:548:34
8:34
+0:02
40K
24.85 mi13:43:553:17:117:567:39
8:57
+0:23
25.2M
25.20 mi13:47:133:20:297:573:18
9:34
+0:37
Finish
26.22 mi13:56:013:29:177:598:48
8:38
-0:56

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

7:34 /mi

Average Pace

7:59 /mi

Slowest Pace

9:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:46

45% of race

Time at Steady Pace

1:07:07

32% of race

Time at Slower Pace

47:24

23% of race

Average Pace: 7:59 /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 mi10:50:1323:297:3423:29
7:34
#10136
10K
6.21 mi11:13:5147:077:3523:38
7:36
#10765
15K
9.32 mi11:37:301:10:467:3623:39
7:37
#10865
20K
12.43 mi12:02:431:35:597:4325:13
8:07
#11719
Half
13.11 mi12:07:571:41:137:435:14
7:40
#11723
25K
15.53 mi12:26:431:59:597:4318:46
7:44
#11476
30K
18.64 mi12:51:352:24:517:4624:52
8:00
#11351
20M
20.00 mi13:02:292:35:457:4710:54
8:01
#11249
21M
21.00 mi13:10:532:44:097:498:24
8:24
#11128
35K
21.75 mi13:17:012:50:177:506:08
8:12
#11229
23M
23.00 mi13:27:423:00:587:5210:41
8:32
#11370
24M
24.00 mi13:36:163:09:327:548:34
8:34
#11562
40K
24.85 mi13:43:553:17:117:567:39
8:57
#11753
25.2M
25.20 mi13:47:133:20:297:573:18
9:34
#11829
Finish
26.22 mi13:56:013:29:177:598:48
8:38
#12037
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi101368200820011120(Top 42%)8689(Top 57%)8689(Top 423%)
10K6.21 mi3.10 mi10765-6298541-3418541-34111386(Top 43%)8824(Top 58%)8824(Top 430%)
15K9.32 mi3.11 mi10865-1008588-478588-4711120(Top 42%)8689(Top 57%)8689(Top 423%)
20K12.43 mi3.11 mi11719-8548950-3628950-36214308(Top 54%)9995(Top 66%)9995(Top 487%)
Half13.11 mi0.68 mi11723-48956-68956-611590(Top 44%)8903(Top 59%)8903(Top 434%)
25K15.53 mi2.42 mi11476+2478834+1228834+12210608(Top 40%)8308(Top 55%)8308(Top 405%)
30K18.64 mi3.11 mi11351+1258725+1098725+10910943(Top 41%)8323(Top 55%)8323(Top 406%)
20M20.00 mi1.36 mi11249+1028663+628663+6210417(Top 39%)7975(Top 53%)7975(Top 389%)
21M21.00 mi1.00 mi11128+1218590+738590+739844(Top 37%)7530(Top 50%)7530(Top 367%)
35K21.75 mi0.75 mi11229-1018624-348624-3413367(Top 50%)9142(Top 60%)9142(Top 446%)
23M23.00 mi1.25 mi11370-1418655-318655-3113412(Top 50%)9100(Top 60%)9100(Top 443%)
24M24.00 mi1.00 mi11562-1928724-698724-6914837(Top 56%)9678(Top 64%)9678(Top 472%)
40K24.85 mi0.85 mi11753-1918787-638787-6315826(Top 59%)10047(Top 66%)10047(Top 490%)
25.2M25.20 mi0.35 mi11829-768809-228809-2215437(Top 58%)9858(Top 65%)9858(Top 480%)
Finish26.22 mi1.02 mi12037-2088874-658874-6516140(Top 61%)10222(Top 67%)10222(Top 498%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

11120

Males

8689

M50-54

8689

5K→10K

3.1 - 6.2 mi

Top 43%
×5story building
+79ft-138ft

Overall

11386

Males

8824

M50-54

8824

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

11120

Males

8689

M50-54

8689

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

14308

Males

9995

M50-54

9995

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

11590

Males

8903

M50-54

8903

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

10608

Males

8308

M50-54

8308

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

10943

Males

8323

M50-54

8323

30K→20M

18.6 - 20.0 mi

Top 39%
×5story building
+64ft-50ft

Overall

10417

Males

7975

M50-54

7975

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

9844

Males

7530

M50-54

7530

21M→35K

21.0 - 21.8 mi

Top 50%
×7story building
+17ft-86ft

Overall

13367

Males

9142

M50-54

9142

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

13412

Males

9100

M50-54

9100

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

14837

Males

9678

M50-54

9678

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15826

Males

10047

M50-54

10047

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

15437

Males

9858

M50-54

9858

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2story building
+22ft-21ft

Overall

16140

Males

10222

M50-54

10222

Passing Analysis

Category:
Athletes Passed
1261
Passed By
3162
Net Change
-1901
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10136
5K → 10K99728-629#10136#10765
10K → 15K149249-100#10765#10865
15K → 20K22876-854#10865#11719
20K → Half2529-4#11719#11723
Half → 25K27023+247#11723#11476
25K → 30K243118+125#11476#11351
30K → 20M14745+102#11351#11249
20M → 21M14827+121#11249#11128
21M → 35K18119-101#11128#11229
35K → 23M54195-141#11229#11370
23M → 24M25217-192#11370#11562
24M → 40K24215-191#11562#11753
40K → 25.2M985-76#11753#11829
25.2M → Finish28236-208#11829#12037
TOTALS12613162-1901
📊

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