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BOSTON MARATHON 2025

Matthew Shields

Bib: 13470•M

OH

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:48
Rank: #18731
Start → 5K
8:18/mi
25:48 split
10K· 6.21 mi
51:42
Rank: #18738 (-7)
5K → 10K
8:20/mi
25:54 split
15K· 9.32 mi
1:17:37
Rank: #18568 (+170)
10K → 15K
8:21/mi
25:55 split
20K· 12.43 mi
1:44:08
Rank: #18511 (+57)
15K → 20K
8:32/mi
26:31 split
Half· 13.11 mi
1:49:56
Rank: #18549 (-38)
20K → Half
8:30/mi
5:48 split
25K· 15.53 mi
2:10:52
Rank: #18433 (+116)
Half → 25K
8:38/mi
20:56 split
30K· 18.64 mi
2:38:14
Rank: #18026 (+407)
25K → 30K
8:49/mi
27:22 split
20M
2:50:20
Rank: #17885 (+141)
30K → 20M
8:54/mi
12:06 split
21M
2:59:33
Rank: #17692 (+193)
20M → 21M
9:13/mi
9:13 split
35K· 21.75 mi
3:06:19
Rank: #17709 (-17)
21M → 35K
9:03/mi
6:46 split
23M
3:17:45
Rank: #17648 (+61)
35K → 23M
9:08/mi
11:26 split
24M
3:26:46
Rank: #17627 (+21)
23M → 24M
9:01/mi
9:01 split
40K· 24.85 mi
3:34:36
Rank: #17606 (+21)
24M → 40K
9:10/mi
7:50 split
25.2M
3:38:08
Rank: #17607 (-1)
40K → 25.2M
10:15/mi
3:32 split
Finish· 26.22 mi
3:46:57
Rank: #17586 (+21)
25.2M → Finish
8:39/mi
8:49 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:56
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time1:57:01
Pace8:56 /mi
📊Positive Split: 6.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:0825:488:1825:48
8:18
-
10K
6.21 mi11:22:0251:428:1925:54
8:20
+0:02
15K
9.32 mi11:47:571:17:378:2025:55
8:21
+0:01
20K
12.43 mi12:14:281:44:088:2326:31
8:32
+0:11
Half
13.11 mi12:20:161:49:568:235:48
8:30
-0:02
25K
15.53 mi12:41:122:10:528:2520:56
8:38
+0:08
30K
18.64 mi13:08:342:38:148:2927:22
8:49
+0:11
20M
20.00 mi13:20:402:50:208:3112:06
8:54
+0:05
21M
21.00 mi13:29:532:59:338:339:13
9:13
+0:19
35K
21.75 mi13:36:393:06:198:346:46
9:03
-0:10
23M
23.00 mi13:48:053:17:458:3611:26
9:08
+0:05
24M
24.00 mi13:57:063:26:468:379:01
9:01
-0:07
40K
24.85 mi14:04:563:34:368:387:50
9:10
+0:09
25.2M
25.20 mi14:08:283:38:088:393:32
10:15
+1:05
Finish
26.22 mi14:17:173:46:578:408:49
8:39
-1:36

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

8:18 /mi

Average Pace

8:40 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:49:56

48% of race

Time at Steady Pace

1:25:00

37% of race

Time at Slower Pace

32:01

14% of race

Average Pace: 8:39 /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 mi10:56:0825:488:1825:48
8:18
#18731
10K
6.21 mi11:22:0251:428:1925:54
8:20
#18738
15K
9.32 mi11:47:571:17:378:2025:55
8:21
#18568
20K
12.43 mi12:14:281:44:088:2326:31
8:32
#18511
Half
13.11 mi12:20:161:49:568:235:48
8:30
#18549
25K
15.53 mi12:41:122:10:528:2520:56
8:38
#18433
30K
18.64 mi13:08:342:38:148:2927:22
8:49
#18026
20M
20.00 mi13:20:402:50:208:3112:06
8:54
#17885
21M
21.00 mi13:29:532:59:338:339:13
9:13
#17692
35K
21.75 mi13:36:393:06:198:346:46
9:03
#17709
23M
23.00 mi13:48:053:17:458:3611:26
9:08
#17648
24M
24.00 mi13:57:063:26:468:379:01
9:01
#17627
40K
24.85 mi14:04:563:34:368:387:50
9:10
#17606
25.2M
25.20 mi14:08:283:38:088:393:32
10:15
#17607
Finish
26.22 mi14:17:173:46:578:408:49
8:39
#17586
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi18731119181191818320(Top 64%)11765(Top 73%)11765(Top 589%)
10K6.21 mi3.10 mi18738-711924-611924-618780(Top 66%)11972(Top 74%)11972(Top 600%)
15K9.32 mi3.11 mi18568+17011852+7211852+7218320(Top 64%)11765(Top 73%)11765(Top 589%)
20K12.43 mi3.11 mi18511+5711830+2211830+2218454(Top 65%)11801(Top 73%)11801(Top 591%)
Half13.11 mi0.68 mi18549-3811849-1911849-1919147(Top 67%)12095(Top 75%)12095(Top 606%)
25K15.53 mi2.42 mi18433+11611782+6711782+6717992(Top 63%)11516(Top 72%)11516(Top 577%)
30K18.64 mi3.11 mi18026+40711561+22111561+22116648(Top 59%)10774(Top 67%)10774(Top 540%)
20M20.00 mi1.36 mi17885+14111475+8611475+8616248(Top 57%)10465(Top 65%)10465(Top 524%)
21M21.00 mi1.00 mi17692+19311379+9611379+9614706(Top 52%)9670(Top 60%)9670(Top 484%)
35K21.75 mi0.75 mi17709-1711368+1111368+1118423(Top 65%)11227(Top 70%)11227(Top 562%)
23M23.00 mi1.25 mi17648+6111296+7211296+7216993(Top 60%)10506(Top 65%)10506(Top 526%)
24M24.00 mi1.00 mi17627+2111258+3811258+3817436(Top 61%)10667(Top 66%)10667(Top 534%)
40K24.85 mi0.85 mi17606+2111220+3811220+3817164(Top 60%)10454(Top 65%)10454(Top 524%)
25.2M25.20 mi0.35 mi17607-111210+1011210+1018032(Top 63%)10832(Top 67%)10832(Top 543%)
Finish26.22 mi1.02 mi17586+2111187+2311187+2317168(Top 60%)10478(Top 65%)10478(Top 525%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

18320

Males

11765

M50-54

11765

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

18780

Males

11972

M50-54

11972

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

18320

Males

11765

M50-54

11765

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

18454

Males

11801

M50-54

11801

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

19147

Males

12095

M50-54

12095

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

17992

Males

11516

M50-54

11516

25K→30K

15.5 - 18.6 mi

Top 59%
×9story building
+181ft-148ft

Overall

16648

Males

10774

M50-54

10774

30K→20M

18.6 - 20.0 mi

Top 57%
×5story building
+64ft-50ft

Overall

16248

Males

10465

M50-54

10465

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

14706

Males

9670

M50-54

9670

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

18423

Males

11227

M50-54

11227

35K→23M

21.8 - 23.0 mi

Top 60%
×5story building
+23ft-63ft

Overall

16993

Males

10506

M50-54

10506

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

17436

Males

10667

M50-54

10667

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

17164

Males

10454

M50-54

10454

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

18032

Males

10832

M50-54

10832

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

17168

Males

10478

M50-54

10478

Passing Analysis

Category:
Athletes Passed
2325
Passed By
1180
Net Change
+1145
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18731
5K → 10K260267-7#18731#18738
10K → 15K280110+170#18738#18568
15K → 20K222165+57#18568#18511
20K → Half2159-38#18511#18549
Half → 25K221105+116#18549#18433
25K → 30K46255+407#18433#18026
30K → 20M19150+141#18026#17885
20M → 21M21522+193#17885#17692
21M → 35K5471-17#17692#17709
35K → 23M13978+61#17709#17648
23M → 24M8968+21#17648#17627
24M → 40K7453+21#17627#17606
40K → 25.2M3031-1#17606#17607
25.2M → Finish6746+21#17607#17586
TOTALS23251180+1145
📊

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