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BOSTON MARATHON 2025

Reade Seiff

Bib: 27840•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
8:49/mi
27:24
↑ 97↓ 3451.5%
10K· 6.21 mi
8:44/mi
54:31
↑ 79↓ 1380.4%
15K· 9.32 mi
8:52/mi
1:22:04
↑ 67↓ 78
20K· 12.43 mi
9:04/mi
1:50:15
↑ 106↓ 860.1%
Half· 13.11 mi
9:01/mi
1:56:24
↑ 19↓ 370.5%
25K· 15.53 mi
9:16/mi
2:18:51
↑ 66↓ 880.2%
30K· 18.64 mi
10:05/mi
2:50:10
↑ 181↓ 1480.2%
20M
10:25/mi
3:04:20
↑ 64↓ 500.2%
21M
11:04/mi
3:15:24
↑ 106↓ 241.6%
35K· 21.75 mi
9:20/mi
3:22:23
↑ 17↓ 861.7%
23M
10:16/mi
3:35:14
↑ 23↓ 630.6%
24M
9:27/mi
3:44:41
↓ 821.3%
40K· 24.85 mi
9:58/mi
3:53:12
↓ 200.3%
25.2M
11:19/mi
3:57:06
↑ 13↓ 160.2%
Finish· 26.22 mi
9:23/mi
4:06:40
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:24
Pace8:53 /mi
2nd Half
Distance13.11 mi
Time2:10:16
Pace9:56 /mi
📊Positive Split: 11.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:0227:248:4927:24
8:49
-
10K
6.21 mi12:12:0954:318:4627:07
8:44
-0:05
15K
9.32 mi12:39:421:22:048:4827:33
8:52
+0:08
20K
12.43 mi13:07:531:50:158:5228:11
9:04
+0:12
Half
13.11 mi13:14:021:56:248:536:09
9:01
-0:03
25K
15.53 mi13:36:292:18:518:5622:27
9:16
+0:15
30K
18.64 mi14:07:482:50:109:0831:19
10:05
+0:49
20M
20.00 mi14:21:583:04:209:1314:10
10:25
+0:20
21M
21.00 mi14:33:023:15:249:1811:04
11:04
+0:39
35K
21.75 mi14:40:013:22:239:186:59
9:20
-1:44
23M
23.00 mi14:52:523:35:149:2112:51
10:16
+0:56
24M
24.00 mi15:02:193:44:419:229:27
9:27
-0:49
40K
24.85 mi15:10:503:53:129:238:31
9:58
+0:31
25.2M
25.20 mi15:14:443:57:069:253:54
11:19
+1:21
Finish
26.22 mi15:24:184:06:409:259:34
9:23
-1:56

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

8:44 /mi

Average Pace

9:25 /mi

Slowest Pace

11:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:22:04

33% of race

Time at Steady Pace

1:22:47

34% of race

Time at Slower Pace

1:21:49

33% of race

Average Pace: 9:24 /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 mi11:45:0227:248:4927:24
8:49
#21601
10K
6.21 mi12:12:0954:318:4627:07
8:44
#21300
15K
9.32 mi12:39:421:22:048:4827:33
8:52
#21291
20K
12.43 mi13:07:531:50:158:5228:11
9:04
#21282
Half
13.11 mi13:14:021:56:248:536:09
9:01
#21327
25K
15.53 mi13:36:292:18:518:5622:27
9:16
#21287
30K
18.64 mi14:07:482:50:109:0831:19
10:05
#21440
20M
20.00 mi14:21:583:04:209:1314:10
10:25
#21539
21M
21.00 mi14:33:023:15:249:1811:04
11:04
#21551
35K
21.75 mi14:40:013:22:239:186:59
9:20
#21484
23M
23.00 mi14:52:523:35:149:2112:51
10:16
#21461
24M
24.00 mi15:02:193:44:419:229:27
9:27
#21366
40K
24.85 mi15:10:503:53:129:238:31
9:58
#21313
25.2M
25.20 mi15:14:443:57:069:253:54
11:19
#21317
Finish
26.22 mi15:24:184:06:409:259:34
9:23
#21288
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21601131341313421374(Top 75%)13115(Top 81%)13115(Top 232%)
10K6.21 mi3.10 mi21300+30113024+11013024+11021033(Top 74%)12940(Top 80%)12940(Top 229%)
15K9.32 mi3.11 mi21291+913035-1113035-1121374(Top 75%)13115(Top 81%)13115(Top 232%)
20K12.43 mi3.11 mi21282+913034+113034+121320(Top 75%)13052(Top 81%)13052(Top 231%)
Half13.11 mi0.68 mi21327-4513049-1513049-1521860(Top 77%)13284(Top 82%)13284(Top 235%)
25K15.53 mi2.42 mi21287+4013024+2513024+2521003(Top 74%)12846(Top 80%)12846(Top 228%)
30K18.64 mi3.11 mi21440-15313053-2913053-2921824(Top 77%)13080(Top 81%)13080(Top 232%)
20M20.00 mi1.36 mi21539-9913093-4013093-4022214(Top 78%)13138(Top 82%)13138(Top 233%)
21M21.00 mi1.00 mi21551-1213077+1613077+1621575(Top 76%)12769(Top 79%)12769(Top 226%)
35K21.75 mi0.75 mi21484+6713035+4213035+4219712(Top 69%)11838(Top 74%)11838(Top 210%)
23M23.00 mi1.25 mi21461+2312997+3812997+3821308(Top 75%)12547(Top 78%)12547(Top 222%)
24M24.00 mi1.00 mi21366+9512935+6212935+6219431(Top 68%)11603(Top 72%)11603(Top 206%)
40K24.85 mi0.85 mi21313+5312886+4912886+4920335(Top 72%)11955(Top 74%)11955(Top 212%)
25.2M25.20 mi0.35 mi21317-412879+712879+721522(Top 76%)12545(Top 78%)12545(Top 222%)
Finish26.22 mi1.02 mi21288+2912852+2712852+2720739(Top 73%)12166(Top 76%)12166(Top 216%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21story building
+97ft-345ft

Overall

21374

Males

13115

M18-39

13115

5K→10K

3.1 - 6.2 mi

Top 74%
×5story building
+79ft-138ft

Overall

21033

Males

12940

M18-39

12940

10K→15K

6.2 - 9.3 mi

Top 75%
×3story building
+67ft-78ft

Overall

21374

Males

13115

M18-39

13115

15K→20K

9.3 - 12.4 mi

Top 75%
×5story building
+106ft-86ft

Overall

21320

Males

13052

M18-39

13052

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

21860

Males

13284

M18-39

13284

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

21003

Males

12846

M18-39

12846

25K→30K

15.5 - 18.6 mi

Top 77%
×9story building
+181ft-148ft

Overall

21824

Males

13080

M18-39

13080

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

22214

Males

13138

M18-39

13138

20M→21M

20.0 - 21.0 mi

Top 76%
×8story building
+106ft-24ft

Overall

21575

Males

12769

M18-39

12769

21M→35K

21.0 - 21.8 mi

Top 69%
×7story building
+17ft-86ft

Overall

19712

Males

11838

M18-39

11838

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

21308

Males

12547

M18-39

12547

23M→24M

23.0 - 24.0 mi

Top 68%
×6story building
+12ft-82ft

Overall

19431

Males

11603

M18-39

11603

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

20335

Males

11955

M18-39

11955

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21522

Males

12545

M18-39

12545

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2story building
+22ft-21ft

Overall

20739

Males

12166

M18-39

12166

Passing Analysis

Category:
Athletes Passed
1811
Passed By
1498
Net Change
+313
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21601
5K → 10K453152+301#21601#21300
10K → 15K223214+9#21300#21291
15K → 20K199190+9#21291#21282
20K → Half2166-45#21282#21327
Half → 25K165125+40#21327#21287
25K → 30K154307-153#21287#21440
30K → 20M59158-99#21440#21539
20M → 21M7789-12#21539#21551
21M → 35K8922+67#21551#21484
35K → 23M10077+23#21484#21461
23M → 24M10510+95#21461#21366
24M → 40K7825+53#21366#21313
40K → 25.2M2832-4#21313#21317
25.2M → Finish6031+29#21317#21288
TOTALS18111498+313
📊

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