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BOSTON MARATHON 2023

Gaozhi Chen

Bib: 8218•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 11%
Gender (Male)
#0 / 15176
Top 19%
Masters (Masters Men)
#0 / 9891
Top 7%
Division (M40-44)
#0 / 2241
Top 19%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:27
Rank: #2749
Start → 5K
20:27 | 6:35/mi
10K· 6.21 mi
41:03
Rank: #3205 (-456)
5K → 10K
20:36 | 6:38/mi
15K· 9.32 mi
1:01:29
Rank: #3182 (+23)
10K → 15K
20:26 | 6:35/mi
20K· 12.43 mi
1:22:39
Rank: #3450 (-268)
15K → 20K
21:10 | 6:49/mi
Half· 13.11 mi
1:27:11
Rank: #3469 (-19)
20K → Half
4:32 | 6:39/mi
25K· 15.53 mi
1:43:18
Rank: #3355 (+114)
Half → 25K
16:07 | 6:39/mi
30K· 18.64 mi
2:04:38
Rank: #3333 (+22)
25K → 30K
21:20 | 6:52/mi
20M
2:13:52
Rank: #3235 (+98)
30K → 20M
9:14 | 6:48/mi
21M
2:21:16
Rank: #3276 (-41)
20M → 21M
7:24 | 7:24/mi
35K· 21.75 mi
2:26:14
Rank: #3261 (+15)
21M → 35K
4:58 | 6:38/mi
23M
2:34:39
Rank: #3153 (+108)
35K → 23M
8:25 | 6:43/mi
24M
2:41:16
Rank: #3106 (+47)
23M → 24M
6:37 | 6:37/mi
40K· 24.85 mi
2:47:00
Rank: #3034 (+72)
24M → 40K
5:44 | 6:42/mi
25.2M
2:49:21
Rank: #2977 (+57)
40K → 25.2M
2:21 | 6:50/mi
Finish· 26.22 mi
2:56:19
Rank: #3007 (-30)
25.2M → Finish
6:58 | 6:50/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:11
Pace6:39 /mi
2nd Half
Distance13.11 mi
Time1:29:08
Pace6:48 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:4020:276:3520:27
6:35
-
10K
6.21 mi11:06:1641:036:3620:36
6:38
+0:03
15K
9.32 mi11:26:421:01:296:3620:26
6:35
-0:03
20K
12.43 mi11:47:521:22:396:3921:10
6:49
+0:14
Half
13.11 mi11:52:241:27:116:394:32
6:39
-0:10
25K
15.53 mi12:08:311:43:186:3916:07
6:39
0:00
30K
18.64 mi12:29:512:04:386:4121:20
6:52
+0:13
20M
20.00 mi12:39:052:13:526:429:14
6:48
-0:04
21M
21.00 mi12:46:292:21:166:447:24
7:24
+0:36
35K
21.75 mi12:51:272:26:146:434:58
6:38
-0:46
23M
23.00 mi12:59:522:34:396:438:25
6:43
+0:05
24M
24.00 mi13:06:292:41:166:436:37
6:37
-0:06
40K
24.85 mi13:12:132:47:006:435:44
6:42
+0:05
25.2M
25.20 mi13:14:342:49:216:432:21
6:50
+0:08
Finish
26.22 mi13:21:322:56:196:446:58
6:50
0:00

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

6:35 /mi

Average Pace

6:44 /mi

Slowest Pace

7:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:55

96% of race

Time at Steady Pace

7:24

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:43 /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 mi10:45:4020:276:3520:27
6:35
#2749
10K
6.21 mi11:06:1641:036:3620:36
6:38
#3205
15K
9.32 mi11:26:421:01:296:3620:26
6:35
#3182
20K
12.43 mi11:47:521:22:396:3921:10
6:49
#3450
Half
13.11 mi11:52:241:27:116:394:32
6:39
#3469
25K
15.53 mi12:08:311:43:186:3916:07
6:39
#3355
30K
18.64 mi12:29:512:04:386:4121:20
6:52
#3333
20M
20.00 mi12:39:052:13:526:429:14
6:48
#3235
21M
21.00 mi12:46:292:21:166:447:24
7:24
#3276
35K
21.75 mi12:51:272:26:146:434:58
6:38
#3261
23M
23.00 mi12:59:522:34:396:438:25
6:43
#3153
24M
24.00 mi13:06:292:41:166:436:37
6:37
#3106
40K
24.85 mi13:12:132:47:006:435:44
6:42
#3034
25.2M
25.20 mi13:14:342:49:216:432:21
6:50
#2977
Finish
26.22 mi13:21:322:56:196:446:58
6:50
#3007
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 mi2749261726173106(Top 12%)2960(Top 20%)2960(Top 132%)
10K6.21 mi3.10 mi3205-4563041-4243041-4243710(Top 14%)3505(Top 23%)3505(Top 156%)
15K9.32 mi3.11 mi3182+233029+123029+123106(Top 12%)2960(Top 20%)2960(Top 132%)
20K12.43 mi3.11 mi3450-2683270-2413270-2414532(Top 17%)4221(Top 28%)4221(Top 188%)
Half13.11 mi0.68 mi3469-193285-153285-153938(Top 15%)3691(Top 24%)3691(Top 165%)
25K15.53 mi2.42 mi3355+1143189+963189+962964(Top 11%)2824(Top 19%)2824(Top 126%)
30K18.64 mi3.11 mi3333+223163+263163+263417(Top 13%)3213(Top 21%)3213(Top 143%)
20M20.00 mi1.36 mi3235+983072+913072+912771(Top 10%)2618(Top 17%)2618(Top 117%)
21M21.00 mi1.00 mi3276-413103-313103-314099(Top 15%)3768(Top 25%)3768(Top 168%)
35K21.75 mi0.75 mi3261+153088+153088+153205(Top 12%)2990(Top 20%)2990(Top 133%)
23M23.00 mi1.25 mi3153+1082991+972991+972274(Top 9%)2145(Top 14%)2145(Top 96%)
24M24.00 mi1.00 mi3106+472945+462945+462649(Top 10%)2467(Top 16%)2467(Top 110%)
40K24.85 mi0.85 mi3034+722875+702875+702374(Top 9%)2204(Top 15%)2204(Top 98%)
25.2M25.20 mi0.35 mi2977+572821+542821+541262(Top 5%)1194(Top 8%)1194(Top 53%)
Finish26.22 mi1.02 mi3007-302847-262847-264240(Top 16%)3716(Top 24%)3716(Top 166%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3106

Males

2960

M40-44

2960

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3710

Males

3505

M40-44

3505

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3106

Males

2960

M40-44

2960

15K→20K

9.3 - 12.4 mi

Top 17%
×5stories
+106ft-86ft

Overall

4532

Males

4221

M40-44

4221

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

3938

Males

3691

M40-44

3691

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

2964

Males

2824

M40-44

2824

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3417

Males

3213

M40-44

3213

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2771

Males

2618

M40-44

2618

20M→21M

20.0 - 21.0 mi

Top 15%
×8stories
+106ft-24ft

Overall

4099

Males

3768

M40-44

3768

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3205

Males

2990

M40-44

2990

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2274

Males

2145

M40-44

2145

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2649

Males

2467

M40-44

2467

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2374

Males

2204

M40-44

2204

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1262

Males

1194

M40-44

1194

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4240

Males

3716

M40-44

3716

Passing Analysis

Category:
Athletes Passed
944
Passed By
1202
Net Change
-258
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2749
5K → 10K33489-456#2749#3205
10K → 15K10279+23#3205#3182
15K → 20K29297-268#3182#3450
20K → Half1130-19#3450#3469
Half → 25K12713+114#3469#3355
25K → 30K10179+22#3355#3333
30K → 20M11416+98#3333#3235
20M → 21M3374-41#3235#3276
21M → 35K3520+15#3276#3261
35K → 23M11911+108#3261#3153
23M → 24M6619+47#3153#3106
24M → 40K8614+72#3106#3034
40K → 25.2M581+57#3034#2977
25.2M → Finish3060-30#2977#3007
TOTALS9441202-258
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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