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BOSTON MARATHON 2025

Fei Shi

Bib: 2830•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 9%
Gender (Male)
#0 / 16105
Top 16%
Masters (Masters Men)
#0 / 10463
Top 5%
Division (M40-44)
#0 / 2247
Top 14%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:10
Rank: #1698
Start → 5K
19:10 | 6:10/mi
10K· 6.21 mi
38:30
Rank: #1854 (-156)
5K → 10K
19:20 | 6:13/mi
15K· 9.32 mi
58:01
Rank: #1970 (-116)
10K → 15K
19:31 | 6:17/mi
20K· 12.43 mi
1:18:20
Rank: #2282 (-312)
15K → 20K
20:19 | 6:32/mi
Half· 13.11 mi
1:22:45
Rank: #2334 (-52)
20K → Half
4:25 | 6:28/mi
25K· 15.53 mi
1:38:45
Rank: #2500 (-166)
Half → 25K
16:00 | 6:36/mi
30K· 18.64 mi
1:59:53
Rank: #2619 (-119)
25K → 30K
21:08 | 6:48/mi
20M
2:09:18
Rank: #2661 (-42)
30K → 20M
9:25 | 6:56/mi
21M
2:16:27
Rank: #2656 (+5)
20M → 21M
7:09 | 7:09/mi
35K· 21.75 mi
2:21:28
Rank: #2676 (-20)
21M → 35K
5:01 | 6:42/mi
23M
2:30:13
Rank: #2692 (-16)
35K → 23M
8:45 | 6:59/mi
24M
2:36:58
Rank: #2674 (+18)
23M → 24M
6:45 | 6:45/mi
40K· 24.85 mi
2:42:57
Rank: #2683 (-9)
24M → 40K
5:59 | 7:00/mi
25.2M
2:45:36
Rank: #2693 (-10)
40K → 25.2M
2:39 | 7:41/mi
Finish· 26.22 mi
2:52:19
Rank: #2690 (+3)
25.2M → Finish
6:43 | 6:35/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:22:45
Pace6:19 /mi
2nd Half
Distance13.11 mi
Time1:29:34
Pace6:50 /mi
📊Positive Split: 8.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:3919:106:1019:10
6:10
-
10K
6.21 mi10:39:5938:306:1219:20
6:13
+0:03
15K
9.32 mi10:59:3058:016:1319:31
6:17
+0:04
20K
12.43 mi11:19:491:18:206:1820:19
6:32
+0:15
Half
13.11 mi11:24:141:22:456:194:25
6:28
-0:04
25K
15.53 mi11:40:141:38:456:2116:00
6:36
+0:08
30K
18.64 mi12:01:221:59:536:2621:08
6:48
+0:12
20M
20.00 mi12:10:472:09:186:289:25
6:56
+0:08
21M
21.00 mi12:17:562:16:276:307:09
7:09
+0:13
35K
21.75 mi12:22:572:21:286:305:01
6:42
-0:27
23M
23.00 mi12:31:422:30:136:328:45
6:59
+0:17
24M
24.00 mi12:38:272:36:586:326:45
6:45
-0:14
40K
24.85 mi12:44:262:42:576:335:59
7:00
+0:15
25.2M
25.20 mi12:47:052:45:366:342:39
7:41
+0:41
Finish
26.22 mi12:53:482:52:196:356:43
6:35
-1:06

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

6:10 /mi

Average Pace

6:35 /mi

Slowest Pace

7:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:02:26

36% of race

Time at Steady Pace

1:15:56

44% of race

Time at Slower Pace

33:57

20% of race

Average Pace: 6:34 /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 mi10:20:3919:106:1019:10
6:10
#1698
10K
6.21 mi10:39:5938:306:1219:20
6:13
#1854
15K
9.32 mi10:59:3058:016:1319:31
6:17
#1970
20K
12.43 mi11:19:491:18:206:1820:19
6:32
#2282
Half
13.11 mi11:24:141:22:456:194:25
6:28
#2334
25K
15.53 mi11:40:141:38:456:2116:00
6:36
#2500
30K
18.64 mi12:01:221:59:536:2621:08
6:48
#2619
20M
20.00 mi12:10:472:09:186:289:25
6:56
#2661
21M
21.00 mi12:17:562:16:276:307:09
7:09
#2656
35K
21.75 mi12:22:572:21:286:305:01
6:42
#2676
23M
23.00 mi12:31:422:30:136:328:45
6:59
#2692
24M
24.00 mi12:38:272:36:586:326:45
6:45
#2674
40K
24.85 mi12:44:262:42:576:335:59
7:00
#2683
25.2M
25.20 mi12:47:052:45:366:342:39
7:41
#2693
Finish
26.22 mi12:53:482:52:196:356:43
6:35
#2690
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1698161416142270(Top 8%)2165(Top 13%)2165(Top 96%)
10K6.21 mi3.10 mi1854-1561764-1501764-1502028(Top 7%)1932(Top 12%)1932(Top 86%)
15K9.32 mi3.11 mi1970-1161875-1111875-1112270(Top 8%)2165(Top 13%)2165(Top 96%)
20K12.43 mi3.11 mi2282-3122180-3052180-3053352(Top 12%)3177(Top 20%)3177(Top 141%)
Half13.11 mi0.68 mi2334-522227-472227-473529(Top 12%)3345(Top 21%)3345(Top 149%)
25K15.53 mi2.42 mi2500-1662386-1592386-1593458(Top 12%)3263(Top 20%)3263(Top 145%)
30K18.64 mi3.11 mi2619-1192499-1132499-1133465(Top 12%)3223(Top 20%)3223(Top 143%)
20M20.00 mi1.36 mi2661-422537-382537-383698(Top 13%)3404(Top 21%)3404(Top 151%)
21M21.00 mi1.00 mi2656+52530+72530+72920(Top 10%)2706(Top 17%)2706(Top 120%)
35K21.75 mi0.75 mi2676-202546-162546-163556(Top 13%)3229(Top 20%)3229(Top 144%)
23M23.00 mi1.25 mi2692-162558-122558-123698(Top 13%)3342(Top 21%)3342(Top 149%)
24M24.00 mi1.00 mi2674+182537+212537+213241(Top 11%)2921(Top 18%)2921(Top 130%)
40K24.85 mi0.85 mi2683-92542-52542-53892(Top 14%)3411(Top 21%)3411(Top 152%)
25.2M25.20 mi0.35 mi2693-102551-92551-94260(Top 15%)3616(Top 22%)3616(Top 161%)
Finish26.22 mi1.02 mi2690+32546+52546+53297(Top 12%)2905(Top 18%)2905(Top 129%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2270

Males

2165

M40-44

2165

5K→10K

3.1 - 6.2 mi

Top 7%
×5stories
+79ft-138ft

Overall

2028

Males

1932

M40-44

1932

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2270

Males

2165

M40-44

2165

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3352

Males

3177

M40-44

3177

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3529

Males

3345

M40-44

3345

Half→25K

13.1 - 15.5 mi

Top 12%
×4stories
+66ft-88ft

Overall

3458

Males

3263

M40-44

3263

25K→30K

15.5 - 18.6 mi

Top 12%
×9stories
+181ft-148ft

Overall

3465

Males

3223

M40-44

3223

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3698

Males

3404

M40-44

3404

20M→21M

20.0 - 21.0 mi

Top 10%
×8stories
+106ft-24ft

Overall

2920

Males

2706

M40-44

2706

21M→35K

21.0 - 21.8 mi

Top 13%
×7stories
+17ft-86ft

Overall

3556

Males

3229

M40-44

3229

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3698

Males

3342

M40-44

3342

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

3241

Males

2921

M40-44

2921

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

3892

Males

3411

M40-44

3411

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4260

Males

3616

M40-44

3616

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

3297

Males

2905

M40-44

2905

Passing Analysis

Category:
Athletes Passed
468
Passed By
1460
Net Change
-992
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1698
5K → 10K43199-156#1698#1854
10K → 15K26142-116#1854#1970
15K → 20K18330-312#1970#2282
20K → Half254-52#2282#2334
Half → 25K24190-166#2334#2500
25K → 30K59178-119#2500#2619
30K → 20M4183-42#2619#2661
20M → 21M5348+5#2661#2656
21M → 35K2444-20#2656#2676
35K → 23M5066-16#2676#2692
23M → 24M5234+18#2692#2674
24M → 40K3544-9#2674#2683
40K → 25.2M919-10#2683#2693
25.2M → Finish3229+3#2693#2690
TOTALS4681460-992
📊

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