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BOSTON MARATHON 2025

Jason Sparks

Bib: 28323•M

NC

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

Start
0:00:00
Race begins
5K· 3.11 mi
26:49
Rank: #20637
Start → 5K
26:49 | 8:38/mi
10K· 6.21 mi
54:22
Rank: #21160 (-523)
5K → 10K
27:33 | 8:52/mi
15K· 9.32 mi
1:22:06
Rank: #21313 (-153)
10K → 15K
27:44 | 8:56/mi
20K· 12.43 mi
1:50:37
Rank: #21451 (-138)
15K → 20K
28:31 | 9:11/mi
Half· 13.11 mi
1:56:09
Rank: #21223 (+228)
20K → Half
5:32 | 8:07/mi
25K· 15.53 mi
2:17:43
Rank: #20927 (+296)
Half → 25K
21:34 | 8:54/mi
30K· 18.64 mi
2:46:21
Rank: #20497 (+430)
25K → 30K
28:38 | 9:13/mi
20M
2:58:59
Rank: #20323 (+174)
30K → 20M
12:38 | 9:18/mi
21M
3:08:58
Rank: #20199 (+124)
20M → 21M
9:59 | 9:59/mi
35K· 21.75 mi
3:15:21
Rank: #20036 (+163)
21M → 35K
6:23 | 8:32/mi
23M
3:26:34
Rank: #19823 (+213)
35K → 23M
11:13 | 8:58/mi
24M
3:35:15
Rank: #19639 (+184)
23M → 24M
8:41 | 8:41/mi
40K· 24.85 mi
3:42:59
Rank: #19516 (+123)
24M → 40K
7:44 | 9:03/mi
25.2M
3:46:22
Rank: #19465 (+51)
40K → 25.2M
3:23 | 9:49/mi
Finish· 26.22 mi
3:55:06
Rank: #19357 (+108)
25.2M → Finish
8:44 | 8:34/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:09
Pace8:52 /mi
2nd Half
Distance13.11 mi
Time1:58:57
Pace9:04 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:2926:498:3826:49
8:38
-
10K
6.21 mi12:20:0254:228:4527:33
8:52
+0:14
15K
9.32 mi12:47:461:22:068:4927:44
8:56
+0:04
20K
12.43 mi13:16:171:50:378:5428:31
9:11
+0:15
Half
13.11 mi13:21:491:56:098:525:32
8:07
-1:04
25K
15.53 mi13:43:232:17:438:5221:34
8:54
+0:47
30K
18.64 mi14:12:012:46:218:5528:38
9:13
+0:19
20M
20.00 mi14:24:392:58:598:5712:38
9:18
+0:05
21M
21.00 mi14:34:383:08:589:009:59
9:59
+0:41
35K
21.75 mi14:41:013:15:218:596:23
8:32
-1:27
23M
23.00 mi14:52:143:26:348:5911:13
8:58
+0:26
24M
24.00 mi15:00:553:35:158:588:41
8:41
-0:17
40K
24.85 mi15:08:393:42:598:587:44
9:03
+0:22
25.2M
25.20 mi15:12:023:46:228:593:23
9:49
+0:46
Finish
26.22 mi15:20:463:55:068:588:44
8:34
-1:15

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

8:07 /mi

Average Pace

8:58 /mi

Slowest Pace

9:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

56:09

24% of race

Time at Steady Pace

1:35:48

41% of race

Time at Slower Pace

1:23:09

35% of race

Average Pace: 8:58 /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 mi11:52:2926:498:3826:49
8:38
#20637
10K
6.21 mi12:20:0254:228:4527:33
8:52
#21160
15K
9.32 mi12:47:461:22:068:4927:44
8:56
#21313
20K
12.43 mi13:16:171:50:378:5428:31
9:11
#21451
Half
13.11 mi13:21:491:56:098:525:32
8:07
#21223
25K
15.53 mi13:43:232:17:438:5221:34
8:54
#20927
30K
18.64 mi14:12:012:46:218:5528:38
9:13
#20497
20M
20.00 mi14:24:392:58:598:5712:38
9:18
#20323
21M
21.00 mi14:34:383:08:589:009:59
9:59
#20199
35K
21.75 mi14:41:013:15:218:596:23
8:32
#20036
23M
23.00 mi14:52:143:26:348:5911:13
8:58
#19823
24M
24.00 mi15:00:553:35:158:588:41
8:41
#19639
40K
24.85 mi15:08:393:42:598:587:44
9:03
#19516
25.2M
25.20 mi15:12:023:46:228:593:23
9:49
#19465
Finish
26.22 mi15:20:463:55:068:588:44
8:34
#19357
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi20637127021270221677(Top 76%)13252(Top 82%)13252(Top 555%)
10K6.21 mi3.10 mi21160-52312964-26212964-26221721(Top 76%)13223(Top 82%)13223(Top 554%)
15K9.32 mi3.11 mi21313-15313045-8113045-8121677(Top 76%)13252(Top 82%)13252(Top 555%)
20K12.43 mi3.11 mi21451-13813102-5713102-5721802(Top 77%)13263(Top 82%)13263(Top 556%)
Half13.11 mi0.68 mi21223+22813009+9313009+9316669(Top 59%)11064(Top 69%)11064(Top 464%)
25K15.53 mi2.42 mi20927+29612868+14112868+14119400(Top 68%)12140(Top 75%)12140(Top 509%)
30K18.64 mi3.11 mi20497+43012626+24212626+24218706(Top 66%)11701(Top 73%)11701(Top 490%)
20M20.00 mi1.36 mi20323+17412531+9512531+9518276(Top 64%)11355(Top 71%)11355(Top 476%)
21M21.00 mi1.00 mi20199+12412449+8212449+8218230(Top 64%)11271(Top 70%)11271(Top 472%)
35K21.75 mi0.75 mi20036+16312368+8112368+8115668(Top 55%)10036(Top 62%)10036(Top 421%)
23M23.00 mi1.25 mi19823+21312247+12112247+12116028(Top 56%)10088(Top 63%)10088(Top 423%)
24M24.00 mi1.00 mi19639+18412138+10912138+10915631(Top 55%)9890(Top 61%)9890(Top 415%)
40K24.85 mi0.85 mi19516+12312075+6312075+6316562(Top 58%)10183(Top 63%)10183(Top 427%)
25.2M25.20 mi0.35 mi19465+5112045+3012045+3016134(Top 57%)9959(Top 62%)9959(Top 417%)
Finish26.22 mi1.02 mi19357+10811974+7111974+7116670(Top 59%)10244(Top 64%)10244(Top 429%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21stories
+97ft-345ft

Overall

21677

Males

13252

M45-49

13252

5K→10K

3.1 - 6.2 mi

Top 76%
×5stories
+79ft-138ft

Overall

21721

Males

13223

M45-49

13223

10K→15K

6.2 - 9.3 mi

Top 76%
×3stories
+67ft-78ft

Overall

21677

Males

13252

M45-49

13252

15K→20K

9.3 - 12.4 mi

Top 77%
×5stories
+106ft-86ft

Overall

21802

Males

13263

M45-49

13263

20K→Half

12.4 - 13.1 mi

Top 59%
×2stories
+19ft-37ft

Overall

16669

Males

11064

M45-49

11064

Half→25K

13.1 - 15.5 mi

Top 68%
×4stories
+66ft-88ft

Overall

19400

Males

12140

M45-49

12140

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

18706

Males

11701

M45-49

11701

30K→20M

18.6 - 20.0 mi

Top 64%
×5stories
+64ft-50ft

Overall

18276

Males

11355

M45-49

11355

20M→21M

20.0 - 21.0 mi

Top 64%
×8stories
+106ft-24ft

Overall

18230

Males

11271

M45-49

11271

21M→35K

21.0 - 21.8 mi

Top 55%
×7stories
+17ft-86ft

Overall

15668

Males

10036

M45-49

10036

35K→23M

21.8 - 23.0 mi

Top 56%
×5stories
+23ft-63ft

Overall

16028

Males

10088

M45-49

10088

23M→24M

23.0 - 24.0 mi

Top 55%
×6stories
+12ft-82ft

Overall

15631

Males

9890

M45-49

9890

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16562

Males

10183

M45-49

10183

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16134

Males

9959

M45-49

9959

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2stories
+22ft-21ft

Overall

16670

Males

10244

M45-49

10244

Passing Analysis

Category:
Athletes Passed
2645
Passed By
1365
Net Change
+1280
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20637
5K → 10K92615-523#20637#21160
10K → 15K163316-153#21160#21313
15K → 20K150288-138#21313#21451
20K → Half2280+228#21451#21223
Half → 25K31115+296#21223#20927
25K → 30K47141+430#20927#20497
30K → 20M18915+174#20497#20323
20M → 21M15935+124#20323#20199
21M → 35K1663+163#20199#20036
35K → 23M2174+213#20036#19823
23M → 24M1884+184#19823#19639
24M → 40K1318+123#19639#19516
40K → 25.2M543+51#19516#19465
25.2M → Finish12618+108#19465#19357
TOTALS26451365+1280
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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