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BOSTON MARATHON 2025

Nicholas Renfro

Bib: 8336•M

UT

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:16/mi
25:42
↑ 97↓ 3451.5%
10K· 6.21 mi
8:22/mi
51:43
↑ 79↓ 1380.4%
15K· 9.32 mi
8:23/mi
1:17:45
↑ 67↓ 78
20K· 12.43 mi
9:11/mi
1:46:17
↑ 106↓ 860.1%
Half· 13.11 mi
9:07/mi
1:52:30
↑ 19↓ 370.5%
25K· 15.53 mi
9:30/mi
2:15:32
↑ 66↓ 880.2%
30K· 18.64 mi
9:43/mi
2:45:43
↑ 181↓ 1480.2%
20M
9:55/mi
2:59:12
↑ 64↓ 500.2%
21M
11:34/mi
3:10:46
↑ 106↓ 241.6%
35K· 21.75 mi
8:59/mi
3:17:29
↑ 17↓ 861.7%
23M
9:26/mi
3:29:18
↑ 23↓ 630.6%
24M
8:59/mi
3:38:17
↓ 821.3%
40K· 24.85 mi
9:39/mi
3:46:32
↓ 200.3%
25.2M
10:06/mi
3:50:01
↑ 13↓ 160.2%
Finish· 26.22 mi
9:03/mi
3:59:14
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:30
Pace8:35 /mi
2nd Half
Distance13.11 mi
Time2:06:44
Pace9:40 /mi
📊Positive Split: 12.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:34:2925:428:1625:42
8:16
-
10K
6.21 mi11:00:3051:438:1926:01
8:22
+0:06
15K
9.32 mi11:26:321:17:458:2126:02
8:23
+0:01
20K
12.43 mi11:55:041:46:178:3328:32
9:11
+0:48
Half
13.11 mi12:01:171:52:308:356:13
9:07
-0:04
25K
15.53 mi12:24:192:15:328:4323:02
9:30
+0:23
30K
18.64 mi12:54:302:45:438:5330:11
9:43
+0:13
20M
20.00 mi13:07:592:59:128:5813:29
9:55
+0:12
21M
21.00 mi13:19:333:10:469:0511:34
11:34
+1:39
35K
21.75 mi13:26:163:17:299:056:43
8:59
-2:35
23M
23.00 mi13:38:053:29:189:0611:49
9:26
+0:27
24M
24.00 mi13:47:043:38:179:068:59
8:59
-0:27
40K
24.85 mi13:55:193:46:329:078:15
9:39
+0:40
25.2M
25.20 mi13:58:483:50:019:083:29
10:06
+0:27
Finish
26.22 mi14:08:013:59:149:089:13
9:03
-1:03

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

8:16 /mi

Average Pace

9:08 /mi

Slowest Pace

11:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:17:45

32% of race

Time at Steady Pace

1:34:31

40% of race

Time at Slower Pace

1:06:58

28% of race

Average Pace: 9:07 /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 mi10:34:2925:428:1625:42
8:16
#18540
10K
6.21 mi11:00:3051:438:1926:01
8:22
#18753
15K
9.32 mi11:26:321:17:458:2126:02
8:23
#18665
20K
12.43 mi11:55:041:46:178:3328:32
9:11
#19594
Half
13.11 mi12:01:171:52:308:356:13
9:07
#19768
25K
15.53 mi12:24:192:15:328:4323:02
9:30
#20206
30K
18.64 mi12:54:302:45:438:5330:11
9:43
#20332
20M
20.00 mi13:07:592:59:128:5813:29
9:55
#20371
21M
21.00 mi13:19:333:10:469:0511:34
11:34
#20574
35K
21.75 mi13:26:163:17:299:056:43
8:59
#20499
23M
23.00 mi13:38:053:29:189:0611:49
9:26
#20382
24M
24.00 mi13:47:043:38:179:068:59
8:59
#20262
40K
24.85 mi13:55:193:46:329:078:15
9:39
#20243
25.2M
25.20 mi13:58:483:50:019:083:29
10:06
#20200
Finish
26.22 mi14:08:013:59:149:089:13
9:03
#20201
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi18540118351183518573(Top 65%)11879(Top 74%)11879(Top 529%)
10K6.21 mi3.10 mi18753-21311931-9611931-9619026(Top 67%)12076(Top 75%)12076(Top 537%)
15K9.32 mi3.11 mi18665+8811900+3111900+3118573(Top 65%)11879(Top 74%)11879(Top 529%)
20K12.43 mi3.11 mi19594-92912298-39812298-39821820(Top 77%)13271(Top 82%)13271(Top 591%)
Half13.11 mi0.68 mi19768-17412368-7012368-7022228(Top 78%)13429(Top 83%)13429(Top 598%)
25K15.53 mi2.42 mi20206-43812542-17412542-17421849(Top 77%)13218(Top 82%)13218(Top 588%)
30K18.64 mi3.11 mi20332-12612557-1512557-1520734(Top 73%)12608(Top 78%)12608(Top 561%)
20M20.00 mi1.36 mi20371-3912555+212555+220662(Top 73%)12433(Top 77%)12433(Top 553%)
21M21.00 mi1.00 mi20574-20312629-7412629-7422735(Top 80%)13313(Top 83%)13313(Top 592%)
35K21.75 mi0.75 mi20499+7512580+4912580+4918123(Top 64%)11113(Top 69%)11113(Top 495%)
23M23.00 mi1.25 mi20382+11712501+7912501+7918403(Top 65%)11173(Top 69%)11173(Top 497%)
24M24.00 mi1.00 mi20262+12012421+8012421+8017278(Top 61%)10608(Top 66%)10608(Top 472%)
40K24.85 mi0.85 mi20243+1912398+2312398+2319264(Top 68%)11450(Top 71%)11450(Top 510%)
25.2M25.20 mi0.35 mi20200+4312377+2112377+2117449(Top 61%)10589(Top 66%)10589(Top 471%)
Finish26.22 mi1.02 mi20201-112366+1112366+1119253(Top 68%)11461(Top 71%)11461(Top 510%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

18573

Males

11879

M40-44

11879

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

19026

Males

12076

M40-44

12076

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

18573

Males

11879

M40-44

11879

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

21820

Males

13271

M40-44

13271

20K→Half

12.4 - 13.1 mi

Top 78%
×2story building
+19ft-37ft

Overall

22228

Males

13429

M40-44

13429

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

21849

Males

13218

M40-44

13218

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

20734

Males

12608

M40-44

12608

30K→20M

18.6 - 20.0 mi

Top 73%
×5story building
+64ft-50ft

Overall

20662

Males

12433

M40-44

12433

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

22735

Males

13313

M40-44

13313

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

18123

Males

11113

M40-44

11113

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

18403

Males

11173

M40-44

11173

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

17278

Males

10608

M40-44

10608

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19264

Males

11450

M40-44

11450

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

17449

Males

10589

M40-44

10589

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

19253

Males

11461

M40-44

11461

Passing Analysis

Category:
Athletes Passed
1366
Passed By
3027
Net Change
-1661
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18540
5K → 10K167380-213#18540#18753
10K → 15K234146+88#18753#18665
15K → 20K37966-929#18665#19594
20K → Half6180-174#19594#19768
Half → 25K60498-438#19768#20206
25K → 30K191317-126#20206#20332
30K → 20M89128-39#20332#20371
20M → 21M40243-203#20371#20574
21M → 35K8611+75#20574#20499
35K → 23M14831+117#20499#20382
23M → 24M13010+120#20382#20262
24M → 40K6344+19#20262#20243
40K → 25.2M5512+43#20243#20200
25.2M → Finish6061-1#20200#20201
TOTALS13663027-1661
📊

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