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BOSTON MARATHON 2023

Chong Altenburg

Bib: 18492•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 43%
Division (F65-69)
#0 / 221
Top 6%
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
7:56/mi
24:38
↑ 97↓ 3451.5%
10K· 6.21 mi
8:08/mi
49:55
↑ 79↓ 1380.4%
15K· 9.32 mi
8:19/mi
1:15:44
↑ 67↓ 78
20K· 12.43 mi
8:35/mi
1:42:23
↑ 106↓ 860.1%
Half· 13.11 mi
8:14/mi
1:48:00
↑ 19↓ 370.5%
25K· 15.53 mi
8:36/mi
2:08:52
↑ 66↓ 880.2%
30K· 18.64 mi
9:02/mi
2:36:55
↑ 181↓ 1480.2%
20M
9:20/mi
2:49:36
↑ 64↓ 500.2%
21M
10:12/mi
2:59:48
↑ 106↓ 241.6%
35K· 21.75 mi
9:13/mi
3:06:42
↑ 17↓ 861.7%
23M
9:32/mi
3:18:38
↑ 23↓ 630.6%
24M
8:46/mi
3:27:24
↓ 821.3%
40K· 24.85 mi
9:09/mi
3:35:13
↓ 200.3%
25.2M
10:03/mi
3:38:41
↑ 13↓ 160.2%
Finish· 26.22 mi
8:56/mi
3:47:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:00
Pace8:14 /mi
2nd Half
Distance13.11 mi
Time1:59:47
Pace9:08 /mi
📊Positive Split: 10.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:5124:387:5624:38
7:56
-
10K
6.21 mi11:41:0849:558:0225:17
8:08
+0:12
15K
9.32 mi12:06:571:15:448:0825:49
8:19
+0:11
20K
12.43 mi12:33:361:42:238:1426:39
8:35
+0:16
Half
13.11 mi12:39:131:48:008:145:37
8:14
-0:21
25K
15.53 mi13:00:052:08:528:1820:52
8:36
+0:22
30K
18.64 mi13:28:082:36:558:2528:03
9:02
+0:26
20M
20.00 mi13:40:492:49:368:2912:41
9:20
+0:18
21M
21.00 mi13:51:012:59:488:3410:12
10:12
+0:52
35K
21.75 mi13:57:553:06:428:356:54
9:13
-0:59
23M
23.00 mi14:09:513:18:388:3811:56
9:32
+0:19
24M
24.00 mi14:18:373:27:248:398:46
8:46
-0:46
40K
24.85 mi14:26:263:35:138:407:49
9:09
+0:23
25.2M
25.20 mi14:29:543:38:418:413:28
10:03
+0:54
Finish
26.22 mi14:39:003:47:478:429:06
8:56
-1:07

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

7:56 /mi

Average Pace

8:42 /mi

Slowest Pace

10:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:08:52

57% of race

Time at Steady Pace

1:00:38

27% of race

Time at Slower Pace

38:17

17% of race

Average Pace: 8:41 /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 mi11:15:5124:387:5624:38
7:56
#13515
10K
6.21 mi11:41:0849:558:0225:17
8:08
#14629
15K
9.32 mi12:06:571:15:448:0825:49
8:19
#15313
20K
12.43 mi12:33:361:42:238:1426:39
8:35
#15846
Half
13.11 mi12:39:131:48:008:145:37
8:14
#15845
25K
15.53 mi13:00:052:08:528:1820:52
8:36
#16004
30K
18.64 mi13:28:082:36:558:2528:03
9:02
#16269
20M
20.00 mi13:40:492:49:368:2912:41
9:20
#16410
21M
21.00 mi13:51:012:59:488:3410:12
10:12
#16563
35K
21.75 mi13:57:553:06:428:356:54
9:13
#16673
23M
23.00 mi14:09:513:18:388:3811:56
9:32
#16803
24M
24.00 mi14:18:373:27:248:398:46
8:46
#16759
40K
24.85 mi14:26:263:35:138:407:49
9:09
#16761
25.2M
25.20 mi14:29:543:38:418:413:28
10:03
#16764
Finish
26.22 mi14:39:003:47:478:429:06
8:56
#16813
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF65-69Seg. OverallSeg. FemalesSeg. F65-69
5K3.11 mi3.11 mi135153731373116609(Top 62%)5675(Top 50%)5675(Top 2568%)
10K6.21 mi3.10 mi14629-11144425-6944425-69415814(Top 59%)5156(Top 45%)5156(Top 2333%)
15K9.32 mi3.11 mi15313-6844862-4374862-43716609(Top 62%)5675(Top 50%)5675(Top 2568%)
20K12.43 mi3.11 mi15846-5335211-3495211-34917353(Top 65%)6140(Top 54%)6140(Top 2778%)
Half13.11 mi0.68 mi15845+15212-15212-116102(Top 60%)5370(Top 47%)5370(Top 2430%)
25K15.53 mi2.42 mi16004-1595343-1315343-13116849(Top 63%)5922(Top 52%)5922(Top 2680%)
30K18.64 mi3.11 mi16269-2655550-2075550-20717332(Top 65%)6262(Top 55%)6262(Top 2833%)
20M20.00 mi1.36 mi16410-1415654-1045654-10418163(Top 68%)6826(Top 60%)6826(Top 3089%)
21M21.00 mi1.00 mi16563-1535742-885742-8818719(Top 70%)7174(Top 63%)7174(Top 3246%)
35K21.75 mi0.75 mi16673-1105810-685810-6818839(Top 71%)7293(Top 64%)7293(Top 3300%)
23M23.00 mi1.25 mi16803-1305903-935903-9318447(Top 69%)7099(Top 62%)7099(Top 3212%)
24M24.00 mi1.00 mi16759+445898+55898+516049(Top 60%)5836(Top 51%)5836(Top 2641%)
40K24.85 mi0.85 mi16761-25917-195917-1916848(Top 63%)6313(Top 55%)6313(Top 2857%)
25.2M25.20 mi0.35 mi16764-35931-145931-1417625(Top 66%)6752(Top 59%)6752(Top 3055%)
Finish26.22 mi1.02 mi16813-495968-375968-3717638(Top 66%)6723(Top 59%)6723(Top 3042%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21story building
+97ft-345ft

Overall

16609

Females

5675

F65-69

5675

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15814

Females

5156

F65-69

5156

10K→15K

6.2 - 9.3 mi

Top 62%
×3story building
+67ft-78ft

Overall

16609

Females

5675

F65-69

5675

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

17353

Females

6140

F65-69

6140

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

16102

Females

5370

F65-69

5370

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

16849

Females

5922

F65-69

5922

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

17332

Females

6262

F65-69

6262

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

18163

Females

6826

F65-69

6826

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

18719

Females

7174

F65-69

7174

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

18839

Females

7293

F65-69

7293

35K→23M

21.8 - 23.0 mi

Top 69%
×5story building
+23ft-63ft

Overall

18447

Females

7099

F65-69

7099

23M→24M

23.0 - 24.0 mi

Top 60%
×6story building
+12ft-82ft

Overall

16049

Females

5836

F65-69

5836

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

16848

Females

6313

F65-69

6313

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

17625

Females

6752

F65-69

6752

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17638

Females

6723

F65-69

6723

Passing Analysis

Category:
Athletes Passed
759
Passed By
4057
Net Change
-3298
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13515
5K → 10K371151-1114#13515#14629
10K → 15K36720-684#14629#15313
15K → 20K58591-533#15313#15846
20K → Half3433+1#15846#15845
Half → 25K91250-159#15845#16004
25K → 30K111376-265#16004#16269
30K → 20M49190-141#16269#16410
20M → 21M48201-153#16410#16563
21M → 35K19129-110#16563#16673
35K → 23M49179-130#16673#16803
23M → 24M8945+44#16803#16759
24M → 40K5860-2#16759#16761
40K → 25.2M2528-3#16761#16764
25.2M → Finish55104-49#16764#16813
TOTALS7594057-3298
📊

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