Boston Marathon logo
BOSTON MARATHON 2023

Bertrand How-Choong

Bib: 6552•M

QC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 20%
Gender (Male)
#0 / 15176
Top 31%
Masters (Masters Men)
#0 / 9891
Top 17%
Division (M40-44)
#0 / 2241
Top 41%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
22:27
Rank: #7646
Start → 5K
22:27 | 7:14/mi
10K· 6.21 mi
44:58
Rank: #8003 (-357)
5K → 10K
22:31 | 7:15/mi
15K· 9.32 mi
1:06:29
Rank: #7310 (+693)
10K → 15K
21:31 | 6:56/mi
20K· 12.43 mi
1:28:15
Rank: #6942 (+368)
15K → 20K
21:46 | 7:00/mi
Half· 13.11 mi
1:32:54
Rank: #6851 (+91)
20K → Half
4:39 | 6:49/mi
25K· 15.53 mi
1:49:44
Rank: #6581 (+270)
Half → 25K
16:50 | 6:57/mi
30K· 18.64 mi
2:11:32
Rank: #6170 (+411)
25K → 30K
21:48 | 7:01/mi
20M
2:21:06
Rank: #5975 (+195)
30K → 20M
9:34 | 7:02/mi
21M
2:28:51
Rank: #5918 (+57)
20M → 21M
7:45 | 7:45/mi
35K· 21.75 mi
2:34:06
Rank: #5873 (+45)
21M → 35K
5:15 | 7:00/mi
23M
2:42:52
Rank: #5698 (+175)
35K → 23M
8:46 | 7:00/mi
24M
2:49:44
Rank: #5578 (+120)
23M → 24M
6:52 | 6:52/mi
40K· 24.85 mi
2:55:41
Rank: #5459 (+119)
24M → 40K
5:57 | 6:58/mi
25.2M
2:58:10
Rank: #5376 (+83)
40K → 25.2M
2:29 | 7:12/mi
Finish· 26.22 mi
3:04:44
Rank: #5196 (+180)
25.2M → Finish
6:34 | 6:27/mi

Course Map & Elevation

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via Half
Distance13.11 mi
Time1:32:54
Pace7:05 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:31:50
Pace7:00 /mi
📊Negative Split: 1.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:26:3722:277:1422:27
7:14
-
10K
6.21 mi10:49:0844:587:1422:31
7:15
+0:01
15K
9.32 mi11:10:391:06:297:0821:31
6:56
-0:19
20K
12.43 mi11:32:251:28:157:0621:46
7:00
+0:04
Half
13.11 mi11:37:041:32:547:054:39
6:49
-0:11
25K
15.53 mi11:53:541:49:447:0416:50
6:57
+0:08
30K
18.64 mi12:15:422:11:327:0321:48
7:01
+0:04
20M
20.00 mi12:25:162:21:067:039:34
7:02
+0:01
21M
21.00 mi12:33:012:28:517:057:45
7:45
+0:43
35K
21.75 mi12:38:162:34:067:055:15
7:00
-0:45
23M
23.00 mi12:47:022:42:527:058:46
7:00
0:00
24M
24.00 mi12:53:542:49:447:046:52
6:52
-0:08
40K
24.85 mi12:59:512:55:417:045:57
6:58
+0:06
25.2M
25.20 mi13:02:202:58:107:042:29
7:12
+0:14
Finish
26.22 mi13:08:543:04:447:036:34
6:27
-0:45

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

6:27 /mi

Average Pace

7:03 /mi

Slowest Pace

7:45 /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

11:13

6% of race

Time at Steady Pace

1:58:19

64% of race

Time at Slower Pace

55:12

30% of race

Average Pace: 7:03 /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 mi10:26:3722:277:1422:27
7:14
#7646
10K
6.21 mi10:49:0844:587:1422:31
7:15
#8003
15K
9.32 mi11:10:391:06:297:0821:31
6:56
#7310
20K
12.43 mi11:32:251:28:157:0621:46
7:00
#6942
Half
13.11 mi11:37:041:32:547:054:39
6:49
#6851
25K
15.53 mi11:53:541:49:447:0416:50
6:57
#6581
30K
18.64 mi12:15:422:11:327:0321:48
7:01
#6170
20M
20.00 mi12:25:162:21:067:039:34
7:02
#5975
21M
21.00 mi12:33:012:28:517:057:45
7:45
#5918
35K
21.75 mi12:38:162:34:067:055:15
7:00
#5873
23M
23.00 mi12:47:022:42:527:058:46
7:00
#5698
24M
24.00 mi12:53:542:49:447:046:52
6:52
#5578
40K
24.85 mi12:59:512:55:417:045:57
6:58
#5459
25.2M
25.20 mi13:02:202:58:107:042:29
7:12
#5376
Finish
26.22 mi13:08:543:04:447:036:34
6:27
#5196
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi7646674267426102(Top 23%)5537(Top 36%)5537(Top 247%)
10K6.21 mi3.10 mi8003-3576962-2206962-2208441(Top 32%)7216(Top 48%)7216(Top 322%)
15K9.32 mi3.11 mi7310+6936484+4786484+4786102(Top 23%)5537(Top 36%)5537(Top 247%)
20K12.43 mi3.11 mi6942+3686206+2786206+2786010(Top 23%)5479(Top 36%)5479(Top 244%)
Half13.11 mi0.68 mi6851+916142+646142+645374(Top 20%)4957(Top 33%)4957(Top 221%)
25K15.53 mi2.42 mi6581+2705915+2275915+2275238(Top 20%)4830(Top 32%)4830(Top 216%)
30K18.64 mi3.11 mi6170+4115593+3225593+3224470(Top 17%)4147(Top 27%)4147(Top 185%)
20M20.00 mi1.36 mi5975+1955432+1615432+1614281(Top 16%)3952(Top 26%)3952(Top 176%)
21M21.00 mi1.00 mi5918+575374+585374+585880(Top 22%)5107(Top 34%)5107(Top 228%)
35K21.75 mi0.75 mi5873+455337+375337+375375(Top 20%)4771(Top 31%)4771(Top 213%)
23M23.00 mi1.25 mi5698+1755188+1495188+1493834(Top 14%)3531(Top 23%)3531(Top 158%)
24M24.00 mi1.00 mi5578+1205086+1025086+1024031(Top 15%)3679(Top 24%)3679(Top 164%)
40K24.85 mi0.85 mi5459+1194980+1064980+1063644(Top 14%)3308(Top 22%)3308(Top 148%)
25.2M25.20 mi0.35 mi5376+834907+734907+732582(Top 10%)2395(Top 16%)2395(Top 107%)
Finish26.22 mi1.02 mi5196+1804756+1514756+1512243(Top 8%)2083(Top 14%)2083(Top 93%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21stories
+97ft-345ft

Overall

6102

Males

5537

M40-44

5537

5K→10K

3.1 - 6.2 mi

Top 32%
×5stories
+79ft-138ft

Overall

8441

Males

7216

M40-44

7216

10K→15K

6.2 - 9.3 mi

Top 23%
×3stories
+67ft-78ft

Overall

6102

Males

5537

M40-44

5537

15K→20K

9.3 - 12.4 mi

Top 23%
×5stories
+106ft-86ft

Overall

6010

Males

5479

M40-44

5479

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5374

Males

4957

M40-44

4957

Half→25K

13.1 - 15.5 mi

Top 20%
×4stories
+66ft-88ft

Overall

5238

Males

4830

M40-44

4830

25K→30K

15.5 - 18.6 mi

Top 17%
×9stories
+181ft-148ft

Overall

4470

Males

4147

M40-44

4147

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4281

Males

3952

M40-44

3952

20M→21M

20.0 - 21.0 mi

Top 22%
×8stories
+106ft-24ft

Overall

5880

Males

5107

M40-44

5107

21M→35K

21.0 - 21.8 mi

Top 20%
×7stories
+17ft-86ft

Overall

5375

Males

4771

M40-44

4771

35K→23M

21.8 - 23.0 mi

Top 14%
×5stories
+23ft-63ft

Overall

3834

Males

3531

M40-44

3531

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4031

Males

3679

M40-44

3679

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

3644

Males

3308

M40-44

3308

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2582

Males

2395

M40-44

2395

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

2243

Males

2083

M40-44

2083

Passing Analysis

Category:
Athletes Passed
2965
Passed By
515
Net Change
+2450
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7646
5K → 10K95452-357#7646#8003
10K → 15K6963+693#8003#7310
15K → 20K3702+368#7310#6942
20K → Half910+91#6942#6851
Half → 25K2733+270#6851#6581
25K → 30K4143+411#6581#6170
30K → 20M1972+195#6170#5975
20M → 21M8225+57#5975#5918
21M → 35K6015+45#5918#5873
35K → 23M1772+175#5873#5698
23M → 24M1233+120#5698#5578
24M → 40K1234+119#5578#5459
40K → 25.2M830+83#5459#5376
25.2M → Finish1811+180#5376#5196
TOTALS2965515+2450
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

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

.gpx files up to 10MB

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