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BOSTON MARATHON 2023

Fei Shi

Bib: 2425•M

CA

Masters
Boston Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 26622
Top 21%
Gender (Male)
#0 / 15176
Top 33%
Masters (Masters Men)
#0 / 9891
Top 19%
Age Group (M40-44)
#0 / 2241
Top 43%
Race Day Weather
49°/39°F
light intensity drizzle

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
21:52
Rank: #6480
Start → 5K
21:52 | 7:02/mi
10K· 6.21 mi
44:01
Rank: #7001 (-521)
5K → 10K
22:09 | 7:08/mi
15K· 9.32 mi
1:05:38
Rank: #6732 (+269)
10K → 15K
21:37 | 6:57/mi
20K· 12.43 mi
1:27:34
Rank: #6614 (+118)
15K → 20K
21:56 | 7:04/mi
Half· 13.11 mi
1:32:19
Rank: #6601 (+13)
20K → Half
4:45 | 6:58/mi
25K· 15.53 mi
1:49:25
Rank: #6459 (+142)
Half → 25K
17:06 | 7:03/mi
30K· 18.64 mi
2:11:57
Rank: #6279 (+180)
25K → 30K
22:32 | 7:15/mi
20M
2:21:44
Rank: #6154 (+125)
30K → 20M
9:47 | 7:12/mi
21M
2:29:18
Rank: #6058 (+96)
20M → 21M
7:34 | 7:34/mi
35K· 21.75 mi
2:34:29
Rank: #5983 (+75)
21M → 35K
5:11 | 6:56/mi
23M
2:43:38
Rank: #5889 (+94)
35K → 23M
9:09 | 7:18/mi
24M
2:50:42
Rank: #5798 (+91)
23M → 24M
7:04 | 7:04/mi
40K· 24.85 mi
2:56:43
Rank: #5698 (+100)
24M → 40K
6:01 | 7:02/mi
25.2M
2:59:18
Rank: #5647 (+51)
40K → 25.2M
2:35 | 7:29/mi
Finish· 26.22 mi
3:06:07
Rank: #5508 (+139)
25.2M → Finish
6:49 | 6:41/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.11 mi
Time1:32:19
Pace7:03 /mi
2nd Half
Distance13.11 mi
Time1:33:48
Pace7:09 /mi
📊Positive Split: 1.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:0421:527:0221:52
7:02
-
10K
6.21 mi10:47:1344:017:0522:09
7:08
+0:06
15K
9.32 mi11:08:501:05:387:0321:37
6:57
-0:11
20K
12.43 mi11:30:461:27:347:0321:56
7:04
+0:07
Half
13.11 mi11:35:311:32:197:034:45
6:58
-0:06
25K
15.53 mi11:52:371:49:257:0317:06
7:03
+0:05
30K
18.64 mi12:15:092:11:577:0522:32
7:15
+0:12
20M
20.00 mi12:24:562:21:447:059:47
7:12
-0:03
21M
21.00 mi12:32:302:29:187:077:34
7:34
+0:22
35K
21.75 mi12:37:412:34:297:065:11
6:56
-0:38
23M
23.00 mi12:46:502:43:387:079:09
7:18
+0:22
24M
24.00 mi12:53:542:50:427:077:04
7:04
-0:14
40K
24.85 mi12:59:552:56:437:076:01
7:02
-0:02
25.2M
25.20 mi13:02:302:59:187:072:35
7:29
+0:27
Finish
26.22 mi13:09:193:06:077:066:49
6:41
-0:48

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

6:41 /mi

Average Pace

7:06 /mi

Slowest Pace

7:34 /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

2:55:58

95% of race

Time at Steady Pace

10:09

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:06 /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 mi10:25:0421:527:0221:52
7:02
#6480
10K
6.21 mi10:47:1344:017:0522:09
7:08
#7001
15K
9.32 mi11:08:501:05:387:0321:37
6:57
#6732
20K
12.43 mi11:30:461:27:347:0321:56
7:04
#6614
Half
13.11 mi11:35:311:32:197:034:45
6:58
#6601
25K
15.53 mi11:52:371:49:257:0317:06
7:03
#6459
30K
18.64 mi12:15:092:11:577:0522:32
7:15
#6279
20M
20.00 mi12:24:562:21:447:059:47
7:12
#6154
21M
21.00 mi12:32:302:29:187:077:34
7:34
#6058
35K
21.75 mi12:37:412:34:297:065:11
6:56
#5983
23M
23.00 mi12:46:502:43:387:079:09
7:18
#5889
24M
24.00 mi12:53:542:50:427:077:04
7:04
#5798
40K
24.85 mi12:59:552:56:437:076:01
7:02
#5698
25.2M
25.20 mi13:02:302:59:187:072:35
7:29
#5647
Finish
26.22 mi13:09:193:06:077:066:49
6:41
#5508
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi6480586958696292(Top 24%)5687(Top 37%)5687(Top 254%)
10K6.21 mi3.10 mi7001-5216257-3886257-3887600(Top 29%)6671(Top 44%)6671(Top 298%)
15K9.32 mi3.11 mi6732+2696055+2026055+2026292(Top 24%)5687(Top 37%)5687(Top 254%)
20K12.43 mi3.11 mi6614+1185943+1125943+1126329(Top 24%)5720(Top 38%)5720(Top 255%)
Half13.11 mi0.68 mi6601+135931+125931+126309(Top 24%)5719(Top 38%)5719(Top 255%)
25K15.53 mi2.42 mi6459+1425818+1135818+1135855(Top 22%)5334(Top 35%)5334(Top 238%)
30K18.64 mi3.11 mi6279+1805668+1505668+1505780(Top 22%)5206(Top 34%)5206(Top 232%)
20M20.00 mi1.36 mi6154+1255564+1045564+1045106(Top 19%)4628(Top 30%)4628(Top 207%)
21M21.00 mi1.00 mi6058+965485+795485+794910(Top 18%)4413(Top 29%)4413(Top 197%)
35K21.75 mi0.75 mi5983+755417+685417+684942(Top 19%)4448(Top 29%)4448(Top 198%)
23M23.00 mi1.25 mi5889+945339+785339+785343(Top 20%)4718(Top 31%)4718(Top 211%)
24M24.00 mi1.00 mi5798+915254+855254+855009(Top 19%)4427(Top 29%)4427(Top 198%)
40K24.85 mi0.85 mi5698+1005165+895165+894046(Top 15%)3628(Top 24%)3628(Top 162%)
25.2M25.20 mi0.35 mi5647+515121+445121+443882(Top 15%)3472(Top 23%)3472(Top 155%)
Finish26.22 mi1.02 mi5508+1395005+1165005+1163469(Top 13%)3111(Top 20%)3111(Top 139%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21stories
+97ft-345ft

Overall

6292

Males

5687

M40-44

5687

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

7600

Males

6671

M40-44

6671

10K→15K

6.2 - 9.3 mi

Top 24%
×3stories
+67ft-78ft

Overall

6292

Males

5687

M40-44

5687

15K→20K

9.3 - 12.4 mi

Top 24%
×5stories
+106ft-86ft

Overall

6329

Males

5720

M40-44

5720

20K→Half

12.4 - 13.1 mi

Top 24%
×2stories
+19ft-37ft

Overall

6309

Males

5719

M40-44

5719

Half→25K

13.1 - 15.5 mi

Top 22%
×4stories
+66ft-88ft

Overall

5855

Males

5334

M40-44

5334

25K→30K

15.5 - 18.6 mi

Top 22%
×9stories
+181ft-148ft

Overall

5780

Males

5206

M40-44

5206

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5106

Males

4628

M40-44

4628

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

4910

Males

4413

M40-44

4413

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

4942

Males

4448

M40-44

4448

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5343

Males

4718

M40-44

4718

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5009

Males

4427

M40-44

4427

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

4046

Males

3628

M40-44

3628

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

3882

Males

3472

M40-44

3472

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2stories
+22ft-21ft

Overall

3469

Males

3111

M40-44

3111

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1746
Passed By
774
Net Change
+972
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6480
5K → 10K37558-521#6480#7001
10K → 15K29728+269#7001#6732
15K → 20K17557+118#6732#6614
20K → Half2411+13#6614#6601
Half → 25K15715+142#6601#6459
25K → 30K21131+180#6459#6279
30K → 20M13611+125#6279#6154
20M → 21M11014+96#6154#6058
21M → 35K794+75#6058#5983
35K → 23M11723+94#5983#5889
23M → 24M10211+91#5889#5798
24M → 40K1055+100#5798#5698
40K → 25.2M543+51#5698#5647
25.2M → Finish1423+139#5647#5508
TOTALS1746774+972
📊

Passing Analysis Visualizations

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

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing