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BOSTON MARATHON 2023

Guanjun Geofferey Chen

Bib: 16878•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
Top 50%
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
8:19/mi
25:49
↑ 97↓ 3451.5%
10K· 6.21 mi
7:59/mi
50:36
↑ 79↓ 1380.4%
15K· 9.32 mi
7:55/mi
1:15:11
↑ 67↓ 78
20K· 12.43 mi
8:01/mi
1:40:06
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:45:28
↑ 19↓ 370.5%
25K· 15.53 mi
8:02/mi
2:04:56
↑ 66↓ 880.2%
30K· 18.64 mi
8:17/mi
2:30:39
↑ 181↓ 1480.2%
20M
8:27/mi
2:42:08
↑ 64↓ 500.2%
21M
9:15/mi
2:51:23
↑ 106↓ 241.6%
35K· 21.75 mi
8:12/mi
2:57:31
↑ 17↓ 861.7%
23M
8:46/mi
3:08:30
↑ 23↓ 630.6%
24M
8:26/mi
3:16:56
↓ 821.3%
40K· 24.85 mi
8:45/mi
3:24:25
↓ 200.3%
25.2M
10:00/mi
3:27:52
↑ 13↓ 160.2%
Finish· 26.22 mi
8:50/mi
3:36:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:28
Pace8:03 /mi
2nd Half
Distance13.11 mi
Time1:51:24
Pace8:30 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:0525:498:1925:49
8:19
-
10K
6.21 mi11:44:5250:368:0924:47
7:59
-0:20
15K
9.32 mi12:09:271:15:118:0424:35
7:55
-0:04
20K
12.43 mi12:34:221:40:068:0324:55
8:01
+0:06
Half
13.11 mi12:39:441:45:288:035:22
7:52
-0:09
25K
15.53 mi12:59:122:04:568:0319:28
8:02
+0:10
30K
18.64 mi13:24:552:30:398:0525:43
8:17
+0:15
20M
20.00 mi13:36:242:42:088:0611:29
8:27
+0:10
21M
21.00 mi13:45:392:51:238:109:15
9:15
+0:48
35K
21.75 mi13:51:472:57:318:106:08
8:12
-1:03
23M
23.00 mi14:02:463:08:308:1210:59
8:46
+0:34
24M
24.00 mi14:11:123:16:568:128:26
8:26
-0:20
40K
24.85 mi14:18:413:24:258:137:29
8:45
+0:19
25.2M
25.20 mi14:22:083:27:528:153:27
10:00
+1:15
Finish
26.22 mi14:31:083:36:528:179:00
8:50
-1:10

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

7:52 /mi

Average Pace

8:17 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:07

46% of race

Time at Steady Pace

1:17:35

36% of race

Time at Slower Pace

40:10

19% of race

Average Pace: 8:16 /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 mi11:20:0525:498:1925:49
8:19
#16207
10K
6.21 mi11:44:5250:368:0924:47
7:59
#15407
15K
9.32 mi12:09:271:15:118:0424:35
7:55
#14865
20K
12.43 mi12:34:221:40:068:0324:55
8:01
#14521
Half
13.11 mi12:39:441:45:288:035:22
7:52
#14467
25K
15.53 mi12:59:122:04:568:0319:28
8:02
#14221
30K
18.64 mi13:24:552:30:398:0525:43
8:17
#13956
20M
20.00 mi13:36:242:42:088:0611:29
8:27
#13882
21M
21.00 mi13:45:392:51:238:109:15
9:15
#13920
35K
21.75 mi13:51:472:57:318:106:08
8:12
#13895
23M
23.00 mi14:02:463:08:308:1210:59
8:46
#13928
24M
24.00 mi14:11:123:16:568:128:26
8:26
#13920
40K
24.85 mi14:18:413:24:258:137:29
8:45
#13926
25.2M
25.20 mi14:22:083:27:528:153:27
10:00
#14006
Finish
26.22 mi14:31:083:36:528:179:00
8:50
#14147
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi16207107721077213668(Top 51%)9773(Top 64%)9773(Top 687%)
10K6.21 mi3.10 mi15407+80010480+29210480+29214628(Top 55%)10172(Top 67%)10172(Top 715%)
15K9.32 mi3.11 mi14865+54210269+21110269+21113668(Top 51%)9773(Top 64%)9773(Top 687%)
20K12.43 mi3.11 mi14521+34410123+14610123+14613595(Top 51%)9708(Top 64%)9708(Top 683%)
Half13.11 mi0.68 mi14467+5410093+3010093+3013276(Top 50%)9606(Top 63%)9606(Top 676%)
25K15.53 mi2.42 mi14221+2469961+1329961+13212976(Top 49%)9347(Top 62%)9347(Top 657%)
30K18.64 mi3.11 mi13956+2659821+1409821+14012879(Top 48%)9186(Top 61%)9186(Top 646%)
20M20.00 mi1.36 mi13882+749776+459776+4513321(Top 50%)9279(Top 61%)9279(Top 653%)
21M21.00 mi1.00 mi13920-389775+19775+114698(Top 55%)9804(Top 65%)9804(Top 689%)
35K21.75 mi0.75 mi13895+259745+309745+3013390(Top 50%)9165(Top 60%)9165(Top 645%)
23M23.00 mi1.25 mi13928-339728+179728+1714815(Top 56%)9723(Top 64%)9723(Top 684%)
24M24.00 mi1.00 mi13920+89697+319697+3114055(Top 53%)9336(Top 62%)9336(Top 657%)
40K24.85 mi0.85 mi13926-69681+169681+1614793(Top 56%)9592(Top 63%)9592(Top 675%)
25.2M25.20 mi0.35 mi14006-809706-259706-2517326(Top 65%)10679(Top 70%)10679(Top 751%)
Finish26.22 mi1.02 mi14147-1419743-379743-3717176(Top 65%)10678(Top 70%)10678(Top 751%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

13668

Males

9773

M55-59

9773

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

14628

Males

10172

M55-59

10172

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

13668

Males

9773

M55-59

9773

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

13595

Males

9708

M55-59

9708

20K→Half

12.4 - 13.1 mi

Top 50%
×2story building
+19ft-37ft

Overall

13276

Males

9606

M55-59

9606

Half→25K

13.1 - 15.5 mi

Top 49%
×4story building
+66ft-88ft

Overall

12976

Males

9347

M55-59

9347

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

12879

Males

9186

M55-59

9186

30K→20M

18.6 - 20.0 mi

Top 50%
×5story building
+64ft-50ft

Overall

13321

Males

9279

M55-59

9279

20M→21M

20.0 - 21.0 mi

Top 55%
×8story building
+106ft-24ft

Overall

14698

Males

9804

M55-59

9804

21M→35K

21.0 - 21.8 mi

Top 50%
×7story building
+17ft-86ft

Overall

13390

Males

9165

M55-59

9165

35K→23M

21.8 - 23.0 mi

Top 56%
×5story building
+23ft-63ft

Overall

14815

Males

9723

M55-59

9723

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14055

Males

9336

M55-59

9336

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

14793

Males

9592

M55-59

9592

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

17326

Males

10679

M55-59

10679

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2story building
+22ft-21ft

Overall

17176

Males

10678

M55-59

10678

Passing Analysis

Category:
Athletes Passed
3015
Passed By
955
Net Change
+2060
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16207
5K → 10K87272+800#16207#15407
10K → 15K57230+542#15407#14865
15K → 20K39248+344#14865#14521
20K → Half6410+54#14521#14467
Half → 25K27428+246#14467#14221
25K → 30K33671+265#14221#13956
30K → 20M12753+74#13956#13882
20M → 21M79117-38#13882#13920
21M → 35K5530+25#13920#13895
35K → 23M76109-33#13895#13928
23M → 24M7062+8#13928#13920
24M → 40K6066-6#13920#13926
40K → 25.2M1292-80#13926#14006
25.2M → Finish26167-141#14006#14147
TOTALS3015955+2060
📊

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