All Results|Race Analytics|Course|Contact
BOSTON MARATHON 2024

Chong Altenburg

Bib: 22011•F

CA

Masters
Boston Marathon logo
0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 25550
Gender (Female)
#0 / 10924
Masters (Masters Women)
#0 / 6263
Age Group (F65-69)
#0 / 216
Top 10%
Race Day Weather
55°/45°F
scattered clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
27:39
Rank: #19685
Start → 5K
27:39 | 8:54/mi
10K· 6.21 mi
55:35
Rank: #19672 (+13)
5K → 10K
27:56 | 8:59/mi
15K· 9.32 mi
1:23:41
Rank: #19472 (+200)
10K → 15K
28:06 | 9:03/mi
20K· 12.43 mi
1:52:18
Rank: #19126 (+346)
15K → 20K
28:37 | 9:13/mi
Half· 13.11 mi
1:58:27
Rank: #19072 (+54)
20K → Half
6:09 | 9:01/mi
25K· 15.53 mi
2:22:13
Rank: #18975 (+97)
Half → 25K
23:46 | 9:48/mi
30K· 18.64 mi
2:53:21
Rank: #18649 (+326)
25K → 30K
31:08 | 10:01/mi
20M
3:06:46
Rank: #18448 (+201)
30K → 20M
13:25 | 9:52/mi
21M
3:17:13
Rank: #18218 (+230)
20M → 21M
10:27 | 10:27/mi
35K· 21.75 mi
3:24:30
Rank: #18125 (+93)
21M → 35K
7:17 | 9:44/mi
23M
3:37:26
Rank: #17983 (+142)
35K → 23M
12:56 | 10:20/mi
24M
3:47:49
Rank: #17954 (+29)
23M → 24M
10:23 | 10:23/mi
40K· 24.85 mi
3:56:43
Rank: #17881 (+73)
24M → 40K
8:54 | 10:25/mi
25.2M
4:00:41
Rank: #17838 (+43)
40K → 25.2M
3:58 | 11:30/mi
Finish· 26.22 mi
4:10:39
Rank: #17797 (+41)
25.2M → Finish
9:58 | 9:47/mi
Is this your race?

Claim it — get your free Race Performance Report

An AI deep-dive into your pacing, rankings, and passing — built from your real splits and emailed to you, free.

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.11 mi
Time1:58:27
Pace9:02 /mi
2nd Half
Distance13.11 mi
Time2:12:12
Pace10:05 /mi
📊Positive Split: 11.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4727:398:5427:39
8:54
-
10K
6.21 mi11:53:4355:358:5727:56
8:59
+0:05
15K
9.32 mi12:21:491:23:418:5928:06
9:03
+0:04
20K
12.43 mi12:50:261:52:189:0228:37
9:13
+0:10
Half
13.11 mi12:56:351:58:279:026:09
9:01
-0:12
25K
15.53 mi13:20:212:22:139:0923:46
9:48
+0:47
30K
18.64 mi13:51:292:53:219:1831:08
10:01
+0:13
20M
20.00 mi14:04:543:06:469:2013:25
9:52
-0:09
21M
21.00 mi14:15:213:17:139:2310:27
10:27
+0:35
35K
21.75 mi14:22:383:24:309:247:17
9:44
-0:43
23M
23.00 mi14:35:343:37:269:2712:56
10:20
+0:36
24M
24.00 mi14:45:573:47:499:3010:23
10:23
+0:03
40K
24.85 mi14:54:513:56:439:318:54
10:25
+0:02
25.2M
25.20 mi14:58:494:00:419:333:58
11:30
+1:05
Finish
26.22 mi15:08:474:10:399:349:58
9:47
-1:43

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

8:54 /mi

Average Pace

9:34 /mi

Slowest Pace

11:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

1:58:27

47% of race

Time at Steady Pace

1:25:34

34% of race

Time at Slower Pace

46:38

19% of race

Average Pace: 9:34 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:25:4727:398:5427:39
8:54
#19685
10K
6.21 mi11:53:4355:358:5727:56
8:59
#19672
15K
9.32 mi12:21:491:23:418:5928:06
9:03
#19472
20K
12.43 mi12:50:261:52:189:0228:37
9:13
#19126
Half
13.11 mi12:56:351:58:279:026:09
9:01
#19072
25K
15.53 mi13:20:212:22:139:0923:46
9:48
#18975
30K
18.64 mi13:51:292:53:219:1831:08
10:01
#18649
20M
20.00 mi14:04:543:06:469:2013:25
9:52
#18448
21M
21.00 mi14:15:213:17:139:2310:27
10:27
#18218
35K
21.75 mi14:22:383:24:309:247:17
9:44
#18125
23M
23.00 mi14:35:343:37:269:2712:56
10:20
#17983
24M
24.00 mi14:45:573:47:499:3010:23
10:23
#17954
40K
24.85 mi14:54:513:56:439:318:54
10:25
#17881
25.2M
25.20 mi14:58:494:00:419:333:58
11:30
#17838
Finish
26.22 mi15:08:474:10:399:349:58
9:47
#17797
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF65-69Seg. OverallSeg. FemalesSeg. F65-69
5K3.11 mi3.11 mi196857714771419107(Top 75%)7301(Top 67%)7301(Top 3380%)
10K6.21 mi3.10 mi19672+137683+317683+3119723(Top 77%)7684(Top 70%)7684(Top 3557%)
15K9.32 mi3.11 mi19472+2007559+1247559+12419107(Top 75%)7301(Top 67%)7301(Top 3380%)
20K12.43 mi3.11 mi19126+3467366+1937366+19318241(Top 71%)6833(Top 63%)6833(Top 3163%)
Half13.11 mi0.68 mi19072+547334+327334+3218368(Top 72%)6985(Top 64%)6985(Top 3234%)
25K15.53 mi2.42 mi18975+977298+367298+3618552(Top 73%)7131(Top 65%)7131(Top 3301%)
30K18.64 mi3.11 mi18649+3267188+1107188+11017422(Top 68%)6746(Top 62%)6746(Top 3123%)
20M20.00 mi1.36 mi18448+2017106+827106+8216055(Top 63%)6236(Top 57%)6236(Top 2887%)
21M21.00 mi1.00 mi18218+2306999+1076999+10714693(Top 58%)5673(Top 52%)5673(Top 2626%)
35K21.75 mi0.75 mi18125+936966+336966+3316345(Top 64%)6535(Top 60%)6535(Top 3025%)
23M23.00 mi1.25 mi17983+1426927+396927+3916525(Top 65%)6668(Top 61%)6668(Top 3087%)
24M24.00 mi1.00 mi17954+296929-26929-217529(Top 69%)7225(Top 66%)7225(Top 3345%)
40K24.85 mi0.85 mi17881+736924+56924+516435(Top 64%)6714(Top 61%)6714(Top 3108%)
25.2M25.20 mi0.35 mi17838+436909+156909+1516094(Top 63%)6593(Top 60%)6593(Top 3052%)
Finish26.22 mi1.02 mi17797+416909690917658(Top 69%)7341(Top 67%)7341(Top 3399%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21stories
+97ft-345ft

Overall

19107

Females

7301

F65-69

7301

5K→10K

3.1 - 6.2 mi

Top 77%
×5stories
+79ft-138ft

Overall

19723

Females

7684

F65-69

7684

10K→15K

6.2 - 9.3 mi

Top 75%
×3stories
+67ft-78ft

Overall

19107

Females

7301

F65-69

7301

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

18241

Females

6833

F65-69

6833

20K→Half

12.4 - 13.1 mi

Top 72%
×2stories
+19ft-37ft

Overall

18368

Females

6985

F65-69

6985

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

18552

Females

7131

F65-69

7131

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

17422

Females

6746

F65-69

6746

30K→20M

18.6 - 20.0 mi

Top 63%
×5stories
+64ft-50ft

Overall

16055

Females

6236

F65-69

6236

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

14693

Females

5673

F65-69

5673

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

16345

Females

6535

F65-69

6535

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

16525

Females

6668

F65-69

6668

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

17529

Females

7225

F65-69

7225

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

16435

Females

6714

F65-69

6714

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

16094

Females

6593

F65-69

6593

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2stories
+22ft-21ft

Overall

17658

Females

7341

F65-69

7341

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2786
Passed By
898
Net Change
+1888
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19685
5K → 10K259246+13#19685#19672
10K → 15K324124+200#19672#19472
15K → 20K43286+346#19472#19126
20K → Half7420+54#19126#19072
Half → 25K235138+97#19072#18975
25K → 30K40377+326#18975#18649
30K → 20M21817+201#18649#18448
20M → 21M24010+230#18448#18218
21M → 35K10411+93#18218#18125
35K → 23M18139+142#18125#17983
23M → 24M7748+29#17983#17954
24M → 40K10532+73#17954#17881
40K → 25.2M518+43#17881#17838
25.2M → Finish8342+41#17838#17797
TOTALS2786898+1888
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Activity Data

Upload your GPX file to see detailed activity metrics

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export & Support

Download your data, get help, and share your feedback

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing