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BOSTON MARATHON 2025

Tomasz Zajac

Bib: 7421•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 30%
Gender (Male)
#0 / 16105
Top 43%
Masters (Masters Men)
#0 / 10463
Top 31%
Division (M45-49)
#0 / 2386
Top 44%
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
7:08/mi
22:09
↑ 97↓ 3451.5%
10K· 6.21 mi
7:15/mi
44:39
↑ 79↓ 1380.4%
15K· 9.32 mi
7:15/mi
1:07:10
↑ 67↓ 78
20K· 12.43 mi
7:17/mi
1:29:47
↑ 106↓ 860.1%
Half· 13.11 mi
7:17/mi
1:34:45
↑ 19↓ 370.5%
25K· 15.53 mi
7:18/mi
1:52:26
↑ 66↓ 880.2%
30K· 18.64 mi
7:46/mi
2:16:34
↑ 181↓ 1480.2%
20M
7:43/mi
2:27:03
↑ 64↓ 500.2%
21M
8:00/mi
2:35:03
↑ 106↓ 241.6%
35K· 21.75 mi
7:41/mi
2:40:48
↑ 17↓ 861.7%
23M
7:46/mi
2:50:32
↑ 23↓ 630.6%
24M
7:45/mi
2:58:17
↓ 821.3%
40K· 24.85 mi
7:45/mi
3:04:55
↓ 200.3%
25.2M
7:47/mi
3:07:36
↑ 13↓ 160.2%
Finish· 26.22 mi
7:02/mi
3:14:46
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:45
Pace7:14 /mi
2nd Half
Distance13.11 mi
Time1:40:01
Pace7:38 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:29:3422:097:0822:09
7:08
-
10K
6.21 mi10:52:0444:397:1122:30
7:15
+0:07
15K
9.32 mi11:14:351:07:107:1222:31
7:15
0:00
20K
12.43 mi11:37:121:29:477:1322:37
7:17
+0:02
Half
13.11 mi11:42:101:34:457:144:58
7:17
0:00
25K
15.53 mi11:59:511:52:267:1417:41
7:18
+0:01
30K
18.64 mi12:23:592:16:347:2024:08
7:46
+0:28
20M
20.00 mi12:34:282:27:037:2110:29
7:43
-0:03
21M
21.00 mi12:42:282:35:037:238:00
8:00
+0:17
35K
21.75 mi12:48:132:40:487:245:45
7:41
-0:19
23M
23.00 mi12:57:572:50:327:259:44
7:46
+0:05
24M
24.00 mi13:05:422:58:177:267:45
7:45
-0:01
40K
24.85 mi13:12:203:04:557:266:38
7:45
0:00
25.2M
25.20 mi13:15:013:07:367:272:41
7:47
+0:02
Finish
26.22 mi13:22:113:14:467:267:10
7:02
-0:45

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

7:02 /mi

Average Pace

7:26 /mi

Slowest Pace

8:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:50

70% of race

Time at Steady Pace

58:56

30% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:26 /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 mi10:29:3422:097:0822:09
7:08
#8872
10K
6.21 mi10:52:0444:397:1122:30
7:15
#9326
15K
9.32 mi11:14:351:07:107:1222:31
7:15
#9379
20K
12.43 mi11:37:121:29:477:1322:37
7:17
#9200
Half
13.11 mi11:42:101:34:457:144:58
7:17
#9232
25K
15.53 mi11:59:511:52:267:1417:41
7:18
#9010
30K
18.64 mi12:23:592:16:347:2024:08
7:46
#9068
20M
20.00 mi12:34:282:27:037:2110:29
7:43
#8975
21M
21.00 mi12:42:282:35:037:238:00
8:00
#8827
35K
21.75 mi12:48:132:40:487:245:45
7:41
#8846
23M
23.00 mi12:57:572:50:327:259:44
7:46
#8765
24M
24.00 mi13:05:422:58:177:267:45
7:45
#8764
40K
24.85 mi13:12:203:04:557:266:38
7:45
#8715
25.2M
25.20 mi13:15:013:07:367:272:41
7:47
#8611
Finish
26.22 mi13:22:113:14:467:267:10
7:02
#8466
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi8872753175319521(Top 34%)7831(Top 49%)7831(Top 328%)
10K6.21 mi3.10 mi9326-4547792-2617792-2619840(Top 35%)8052(Top 50%)8052(Top 337%)
15K9.32 mi3.11 mi9379-537804-127804-129521(Top 34%)7831(Top 49%)7831(Top 328%)
20K12.43 mi3.11 mi9200+1797672+1327672+1328864(Top 31%)7375(Top 46%)7375(Top 309%)
Half13.11 mi0.68 mi9232-327686-147686-149734(Top 34%)7862(Top 49%)7862(Top 330%)
25K15.53 mi2.42 mi9010+2227533+1537533+1538314(Top 29%)6949(Top 43%)6949(Top 291%)
30K18.64 mi3.11 mi9068-587504+297504+299663(Top 34%)7509(Top 47%)7509(Top 315%)
20M20.00 mi1.36 mi8975+937421+837421+838428(Top 30%)6683(Top 41%)6683(Top 280%)
21M21.00 mi1.00 mi8827+1487306+1157306+1157338(Top 26%)5873(Top 36%)5873(Top 246%)
35K21.75 mi0.75 mi8846-197293+137293+139908(Top 35%)7308(Top 45%)7308(Top 306%)
23M23.00 mi1.25 mi8765+817204+897204+898389(Top 30%)6385(Top 40%)6385(Top 268%)
24M24.00 mi1.00 mi8764+17165+397165+399430(Top 33%)6864(Top 43%)6864(Top 288%)
40K24.85 mi0.85 mi8715+497097+687097+688456(Top 30%)6230(Top 39%)6230(Top 261%)
25.2M25.20 mi0.35 mi8611+1047024+737024+734812(Top 17%)4010(Top 25%)4010(Top 168%)
Finish26.22 mi1.02 mi8466+1456917+1076917+1075950(Top 21%)4708(Top 29%)4708(Top 197%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

9521

Males

7831

M45-49

7831

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9840

Males

8052

M45-49

8052

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

9521

Males

7831

M45-49

7831

15K→20K

9.3 - 12.4 mi

Top 31%
×5story building
+106ft-86ft

Overall

8864

Males

7375

M45-49

7375

20K→Half

12.4 - 13.1 mi

Top 34%
×2story building
+19ft-37ft

Overall

9734

Males

7862

M45-49

7862

Half→25K

13.1 - 15.5 mi

Top 29%
×4story building
+66ft-88ft

Overall

8314

Males

6949

M45-49

6949

25K→30K

15.5 - 18.6 mi

Top 34%
×9story building
+181ft-148ft

Overall

9663

Males

7509

M45-49

7509

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

8428

Males

6683

M45-49

6683

20M→21M

20.0 - 21.0 mi

Top 26%
×8story building
+106ft-24ft

Overall

7338

Males

5873

M45-49

5873

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

9908

Males

7308

M45-49

7308

35K→23M

21.8 - 23.0 mi

Top 30%
×5story building
+23ft-63ft

Overall

8389

Males

6385

M45-49

6385

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

9430

Males

6864

M45-49

6864

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

8456

Males

6230

M45-49

6230

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4812

Males

4010

M45-49

4010

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2story building
+22ft-21ft

Overall

5950

Males

4708

M45-49

4708

Passing Analysis

Category:
Athletes Passed
1954
Passed By
1548
Net Change
+406
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8872
5K → 10K88542-454#8872#9326
10K → 15K134187-53#9326#9379
15K → 20K26687+179#9379#9200
20K → Half2557-32#9200#9232
Half → 25K26139+222#9232#9010
25K → 30K201259-58#9010#9068
30K → 20M14754+93#9068#8975
20M → 21M17931+148#8975#8827
21M → 35K4665-19#8827#8846
35K → 23M15675+81#8846#8765
23M → 24M8281+1#8765#8764
24M → 40K10455+49#8764#8715
40K → 25.2M1051+104#8715#8611
25.2M → Finish16015+145#8611#8466
TOTALS19541548+406
📊

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