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BOSTON MARATHON 2025

Xiangdong Shi

WA

Bib: 10881 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:11/mi
25:26
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:28/mi
51:44
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:35/mi
1:18:23
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:33/mi
1:44:56
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:50/mi
1:50:17
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:20/mi
2:10:30
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:45/mi
2:37:41
↑ 181↓ 1480.2%
138 ft elev
20M
8:50/mi
2:49:41
↑ 64↓ 500.2%
148 ft elev
21M
9:00/mi
2:58:41
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:07/mi
3:04:45
↑ 17↓ 861.7%
156 ft elev
23M
9:29/mi
3:16:38
↑ 23↓ 630.6%
116 ft elev
24M
9:12/mi
3:25:50
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:59/mi
3:33:31
↓ 200.3%
20 ft elev
25.2M
9:37/mi
3:36:50
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:53/mi
3:45:53
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:50:178:25 /mi⚡ faster
2nd Half
1:55:368:49 /mi+4.8%
Positive split — 4.8% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
25:268:113.11 mi25:26
8:11
-
10K
51:448:203.10 mi26:18
8:28
+0:17
15K
1:18:238:253.11 mi26:39
8:35
+0:07
20K
1:44:568:273.11 mi26:33
8:33
-0:02
Half(13.11 mi)
1:50:178:250.68 mi5:21
7:50
-0:43
25K
2:10:308:242.42 mi20:13
8:20
+0:30
30K
2:37:418:283.11 mi27:11
8:45
+0:25
20M
2:49:418:291.36 mi12:00
8:50
+0:05
21M
2:58:418:311.00 mi9:00
9:00
+0:10
35K
3:04:458:300.75 mi6:04
8:07
-0:53
23M
3:16:388:331.25 mi11:53
9:29
+1:22
24M
3:25:508:351.00 mi9:12
9:12
-0:17
40K
3:33:318:350.85 mi7:41
8:59
-0:13
25.2M
3:36:508:360.35 mi3:19
9:37
+0:38
Finish(26.22 mi)
3:45:538:371.02 mi9:03
8:53
-0:44
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:50 /mi

Average Pace

8:37 /mi

Slowest Pace

9:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:23:22

37% of race

Time at Steady Pace

1:49:07

48% of race

Time at Slower Pace

33:24

15% of race

Average Pace: 8:37 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi180071160211602197831240412404
10K3.10 mi18768-76111935-33311935-333195921230312303
15K3.11 mi19082-31412072-13712072-137197831240412404
20K3.11 mi18921+16112009+6312009+63185171182511825
Half(13.11 mi)0.68 mi18719+20211920+8911920+89145951017610176
25K2.42 mi18257+46211701+21911701+219161601071310713
30K3.11 mi17835+42211475+22611475+226162851061810618
20M1.36 mi17666+16911372+10311372+103158351030710307
21M1.00 mi17421+24511246+12611246+1261350091149114
35K0.75 mi17239+18211144+10211144+1021299188158815
23M1.25 mi17340-10111156-1211156-12186361127411274
24M1.00 mi17384-4411152+411152+4183341107311073
40K0.85 mi17341+4311113+3911113+39162071001110011
25.2M0.35 mi17305+3611088+2511088+251515694959495
Finish(26.22 mi)1.02 mi17349-4411079+911079+9184321108111081

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

19783

Males

12404

M45-49

12404

5K→10K

3.1 - 6.2 mi

Top 69%
×5story building
+79ft-138ft

Overall

19592

Males

12303

M45-49

12303

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

19783

Males

12404

M45-49

12404

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

18517

Males

11825

M45-49

11825

20K→Half

12.4 - 13.1 mi

Top 51%
×2story building
+19ft-37ft

Overall

14595

Males

10176

M45-49

10176

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16160

Males

10713

M45-49

10713

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

16285

Males

10618

M45-49

10618

30K→20M

18.6 - 20.0 mi

Top 56%
×5story building
+64ft-50ft

Overall

15835

Males

10307

M45-49

10307

20M→21M

20.0 - 21.0 mi

Top 48%
×8story building
+106ft-24ft

Overall

13500

Males

9114

M45-49

9114

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

12991

Males

8815

M45-49

8815

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

18636

Males

11274

M45-49

11274

23M→24M

23.0 - 24.0 mi

Top 65%
×6story building
+12ft-82ft

Overall

18334

Males

11073

M45-49

11073

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16207

Males

10011

M45-49

10011

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

15156

Males

9495

M45-49

9495

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2story building
+22ft-21ft

Overall

18432

Males

11081

M45-49

11081

Passing Analysis

Category:
▲Net Change
+0
0 passed by0 passed
SegmentMovementRank
Start → 5K-#18007
5K → 10K
82968-761
#18007 → #18768
10K → 15K
417103-314
#18768 → #19082
15K → 20K
119280+161
#19082 → #18921
20K → Half
1203+202
#18921 → #18719
Half → 25K
4466+462
#18719 → #18257
25K → 30K
51473+422
#18257 → #17835
30K → 20M
37206+169
#17835 → #17666
20M → 21M
13258+245
#17666 → #17421
21M → 35K
5187+182
#17421 → #17239
35K → 23M
18584-101
#17239 → #17340
23M → 24M
11672-44
#17340 → #17384
24M → 40K
4386+43
#17384 → #17341
40K → 25.2M
1349+36
#17341 → #17305
25.2M → Finish
9854-44
#17305 → #17349
TOTALS
19312589+658
#18007 → #17349

Passing Visualized

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