Boston Marathon logo
BOSTON MARATHON 2023

Pierre Brossoit

Bib: 16821•M

QC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 45%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 50%
Division (M55-59)
#0 / 1422
Top 35%
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
8:12/mi
25:28
↑ 97↓ 3451.5%
10K· 6.21 mi
8:17/mi
51:12
↑ 79↓ 1380.4%
15K· 9.32 mi
8:05/mi
1:16:19
↑ 67↓ 78
20K· 12.43 mi
8:02/mi
1:41:15
↑ 106↓ 860.1%
Half· 13.11 mi
7:50/mi
1:46:36
↑ 19↓ 370.5%
25K· 15.53 mi
7:59/mi
2:05:58
↑ 66↓ 880.2%
30K· 18.64 mi
8:06/mi
2:31:09
↑ 181↓ 1480.2%
20M
8:03/mi
2:42:05
↑ 64↓ 500.2%
21M
8:21/mi
2:50:26
↑ 106↓ 241.6%
35K· 21.75 mi
7:37/mi
2:56:08
↑ 17↓ 861.7%
23M
7:38/mi
3:05:42
↑ 23↓ 630.6%
24M
7:33/mi
3:13:15
↓ 821.3%
40K· 24.85 mi
7:34/mi
3:19:43
↓ 200.3%
25.2M
7:44/mi
3:22:23
↑ 13↓ 160.2%
Finish· 26.22 mi
7:00/mi
3:29:31
↑ 22↓ 21

The Course

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
Time1:46:36
Pace8:08 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:42:55
Pace7:51 /mi
📊Negative Split: 3.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:4725:288:1225:28
8:12
-
10K
6.21 mi11:41:3151:128:1425:44
8:17
+0:05
15K
9.32 mi12:06:381:16:198:1125:07
8:05
-0:12
20K
12.43 mi12:31:341:41:158:0924:56
8:02
-0:03
Half
13.11 mi12:36:551:46:368:085:21
7:50
-0:12
25K
15.53 mi12:56:172:05:588:0719:22
7:59
+0:09
30K
18.64 mi13:21:282:31:098:0725:11
8:06
+0:07
20M
20.00 mi13:32:242:42:058:0610:56
8:03
-0:03
21M
21.00 mi13:40:452:50:268:078:21
8:21
+0:18
35K
21.75 mi13:46:272:56:088:065:42
7:37
-0:44
23M
23.00 mi13:56:013:05:428:049:34
7:38
+0:01
24M
24.00 mi14:03:343:13:158:037:33
7:33
-0:05
40K
24.85 mi14:10:023:19:438:026:28
7:34
+0:01
25.2M
25.20 mi14:12:423:22:238:022:40
7:44
+0:10
Finish
26.22 mi14:19:503:29:318:007:08
7:00
-0:44

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

7:00 /mi

Average Pace

8:00 /mi

Slowest Pace

8:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

36:25

17% of race

Time at Steady Pace

2:19:01

66% of race

Time at Slower Pace

34:05

16% 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 mi11:15:4725:288:1225:28
8:12
#15439
10K
6.21 mi11:41:3151:128:1425:44
8:17
#16102
15K
9.32 mi12:06:381:16:198:1125:07
8:05
#15727
20K
12.43 mi12:31:341:41:158:0924:56
8:02
#15231
Half
13.11 mi12:36:551:46:368:085:21
7:50
#15108
25K
15.53 mi12:56:172:05:588:0719:22
7:59
#14709
30K
18.64 mi13:21:282:31:098:0725:11
8:06
#14159
20M
20.00 mi13:32:242:42:058:0610:56
8:03
#13863
21M
21.00 mi13:40:452:50:268:078:21
8:21
#13569
35K
21.75 mi13:46:272:56:088:065:42
7:37
#13399
23M
23.00 mi13:56:013:05:428:049:34
7:38
#12990
24M
24.00 mi14:03:343:13:158:037:33
7:33
#12779
40K
24.85 mi14:10:023:19:438:026:28
7:34
#12559
25.2M
25.20 mi14:12:423:22:238:022:40
7:44
#12424
Finish
26.22 mi14:19:503:29:318:007:08
7:00
#12100
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi15439104871048715038(Top 56%)10317(Top 68%)10317(Top 726%)
10K6.21 mi3.10 mi16102-66310741-25410741-25416787(Top 63%)11024(Top 73%)11024(Top 775%)
15K9.32 mi3.11 mi15727+37510596+14510596+14515038(Top 56%)10317(Top 68%)10317(Top 726%)
20K12.43 mi3.11 mi15231+49610381+21510381+21513633(Top 51%)9717(Top 64%)9717(Top 683%)
Half13.11 mi0.68 mi15108+12310335+4610335+4613027(Top 49%)9484(Top 62%)9484(Top 667%)
25K15.53 mi2.42 mi14709+39910162+17310162+17312623(Top 47%)9173(Top 60%)9173(Top 645%)
30K18.64 mi3.11 mi14159+5509903+2599903+25911678(Top 44%)8658(Top 57%)8658(Top 609%)
20M20.00 mi1.36 mi13863+2969766+1379766+13710594(Top 40%)8050(Top 53%)8050(Top 566%)
21M21.00 mi1.00 mi13569+2949634+1329634+1329530(Top 36%)7368(Top 49%)7368(Top 518%)
35K21.75 mi0.75 mi13399+1709553+819553+819406(Top 35%)7311(Top 48%)7311(Top 514%)
23M23.00 mi1.25 mi12990+4099351+2029351+2027373(Top 28%)6053(Top 40%)6053(Top 426%)
24M24.00 mi1.00 mi12779+2119241+1109241+1108048(Top 30%)6356(Top 42%)6356(Top 447%)
40K24.85 mi0.85 mi12559+2209133+1089133+1087115(Top 27%)5708(Top 38%)5708(Top 401%)
25.2M25.20 mi0.35 mi12424+1359068+659068+655074(Top 19%)4351(Top 29%)4351(Top 306%)
Finish26.22 mi1.02 mi12100+3248903+1658903+1655227(Top 20%)4435(Top 29%)4435(Top 312%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15038

Males

10317

M55-59

10317

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

16787

Males

11024

M55-59

11024

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15038

Males

10317

M55-59

10317

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

13633

Males

9717

M55-59

9717

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

13027

Males

9484

M55-59

9484

Half→25K

13.1 - 15.5 mi

Top 47%
×4story building
+66ft-88ft

Overall

12623

Males

9173

M55-59

9173

25K→30K

15.5 - 18.6 mi

Top 44%
×9story building
+181ft-148ft

Overall

11678

Males

8658

M55-59

8658

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

10594

Males

8050

M55-59

8050

20M→21M

20.0 - 21.0 mi

Top 36%
×8story building
+106ft-24ft

Overall

9530

Males

7368

M55-59

7368

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

9406

Males

7311

M55-59

7311

35K→23M

21.8 - 23.0 mi

Top 28%
×5story building
+23ft-63ft

Overall

7373

Males

6053

M55-59

6053

23M→24M

23.0 - 24.0 mi

Top 30%
×6story building
+12ft-82ft

Overall

8048

Males

6356

M55-59

6356

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7115

Males

5708

M55-59

5708

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5074

Males

4351

M55-59

4351

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2story building
+22ft-21ft

Overall

5227

Males

4435

M55-59

4435

Passing Analysis

Category:
Athletes Passed
4211
Passed By
872
Net Change
+3339
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15439
5K → 10K94757-663#15439#16102
10K → 15K43964+375#16102#15727
15K → 20K51620+496#15727#15231
20K → Half1274+123#15231#15108
Half → 25K4034+399#15108#14709
25K → 30K5566+550#14709#14159
30K → 20M2993+296#14159#13863
20M → 21M2973+294#13863#13569
21M → 35K1700+170#13569#13399
35K → 23M4090+409#13399#12990
23M → 24M2176+211#12990#12779
24M → 40K2233+220#12779#12559
40K → 25.2M1350+135#12559#12424
25.2M → Finish3262+324#12424#12100
TOTALS4211872+3339
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing