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BOSTON MARATHON 2025

Tiffany Nelson

Bib: 20066•F

NC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F40-44)
#0 / 1718
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
8:12/mi
25:28
↑ 97↓ 3451.5%
10K· 6.21 mi
8:23/mi
51:30
↑ 79↓ 1380.4%
15K· 9.32 mi
8:35/mi
1:18:11
↑ 67↓ 78
20K· 12.43 mi
8:43/mi
1:45:17
↑ 106↓ 860.1%
Half· 13.11 mi
8:48/mi
1:51:17
↑ 19↓ 370.5%
25K· 15.53 mi
9:25/mi
2:14:08
↑ 66↓ 880.2%
30K· 18.64 mi
9:27/mi
2:43:29
↑ 181↓ 1480.2%
20M
9:42/mi
2:56:40
↑ 64↓ 500.2%
21M
10:12/mi
3:06:52
↑ 106↓ 241.6%
35K· 21.75 mi
9:41/mi
3:14:07
↑ 17↓ 861.7%
23M
10:09/mi
3:26:50
↑ 23↓ 630.6%
24M
10:04/mi
3:36:54
↓ 821.3%
40K· 24.85 mi
10:14/mi
3:45:39
↓ 200.3%
25.2M
10:44/mi
3:49:21
↑ 13↓ 160.2%
Finish· 26.22 mi
8:58/mi
3:58:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:17
Pace8:29 /mi
2nd Half
Distance13.11 mi
Time2:07:12
Pace9:42 /mi
📊Positive Split: 14.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:1425:288:1225:28
8:12
-
10K
6.21 mi11:47:1651:308:1726:02
8:23
+0:11
15K
9.32 mi12:13:571:18:118:2326:41
8:35
+0:12
20K
12.43 mi12:41:031:45:178:2827:06
8:43
+0:08
Half
13.11 mi12:47:031:51:178:296:00
8:48
+0:05
25K
15.53 mi13:09:542:14:088:3822:51
9:25
+0:37
30K
18.64 mi13:39:152:43:298:4629:21
9:27
+0:02
20M
20.00 mi13:52:262:56:408:5013:11
9:42
+0:15
21M
21.00 mi14:02:383:06:528:5410:12
10:12
+0:30
35K
21.75 mi14:09:533:14:078:567:15
9:41
-0:31
23M
23.00 mi14:22:363:26:509:0012:43
10:09
+0:28
24M
24.00 mi14:32:403:36:549:0210:04
10:04
-0:05
40K
24.85 mi14:41:253:45:399:058:45
10:14
+0:10
25.2M
25.20 mi14:45:073:49:219:063:42
10:44
+0:30
Finish
26.22 mi14:54:153:58:299:069:08
8:58
-1:46

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

8:12 /mi

Average Pace

9:06 /mi

Slowest Pace

10:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:00:25

50% of race

Time at Steady Pace

1:12:38

30% of race

Time at Slower Pace

45:26

19% of race

Average Pace: 9:06 /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 mi11:21:1425:288:1225:28
8:12
#18092
10K
6.21 mi11:47:1651:308:1726:02
8:23
#18538
15K
9.32 mi12:13:571:18:118:2326:41
8:35
#18961
20K
12.43 mi12:41:031:45:178:2827:06
8:43
#19095
Half
13.11 mi12:47:031:51:178:296:00
8:48
#19195
25K
15.53 mi13:09:542:14:088:3822:51
9:25
#19710
30K
18.64 mi13:39:152:43:298:4629:21
9:27
#19701
20M
20.00 mi13:52:262:56:408:5013:11
9:42
#19732
21M
21.00 mi14:02:383:06:528:5410:12
10:12
#19705
35K
21.75 mi14:09:533:14:078:567:15
9:41
#19758
23M
23.00 mi14:22:363:26:509:0012:43
10:09
#19875
24M
24.00 mi14:32:403:36:549:0210:04
10:04
#19988
40K
24.85 mi14:41:253:45:399:058:45
10:14
#20056
25.2M
25.20 mi14:45:073:49:219:063:42
10:44
#20076
Finish
26.22 mi14:54:153:58:299:069:08
8:58
#20051
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi180926402640219877(Top 70%)7378(Top 60%)7378(Top 429%)
10K6.21 mi3.10 mi18538-4466637-2356637-23519078(Top 67%)6929(Top 57%)6929(Top 403%)
15K9.32 mi3.11 mi18961-4236885-2486885-24819877(Top 70%)7378(Top 60%)7378(Top 429%)
20K12.43 mi3.11 mi19095-1346958-736958-7319546(Top 69%)7232(Top 59%)7232(Top 421%)
Half13.11 mi0.68 mi19195-1007023-657023-6520905(Top 74%)7988(Top 65%)7988(Top 465%)
25K15.53 mi2.42 mi19710-5157322-2997322-29921634(Top 76%)8443(Top 69%)8443(Top 491%)
30K18.64 mi3.11 mi19701+97352-307352-3019733(Top 69%)7515(Top 61%)7515(Top 437%)
20M20.00 mi1.36 mi19732-317390-387390-3819951(Top 70%)7760(Top 63%)7760(Top 452%)
21M21.00 mi1.00 mi19705+277407-177407-1719036(Top 67%)7348(Top 60%)7348(Top 428%)
35K21.75 mi0.75 mi19758-537451-447451-4420988(Top 74%)8492(Top 69%)8492(Top 494%)
23M23.00 mi1.25 mi19875-1177553-1027553-10220993(Top 74%)8550(Top 70%)8550(Top 498%)
24M24.00 mi1.00 mi19988-1137634-817634-8121547(Top 76%)8879(Top 73%)8879(Top 517%)
40K24.85 mi0.85 mi20056-687690-567690-5621189(Top 75%)8759(Top 72%)8759(Top 510%)
25.2M25.20 mi0.35 mi20076-207711-217711-2119850(Top 70%)8078(Top 66%)8078(Top 470%)
Finish26.22 mi1.02 mi20051+257710+17710+118873(Top 66%)7533(Top 62%)7533(Top 438%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

19877

Females

7378

F40-44

7378

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

19078

Females

6929

F40-44

6929

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

19877

Females

7378

F40-44

7378

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

19546

Females

7232

F40-44

7232

20K→Half

12.4 - 13.1 mi

Top 74%
×2story building
+19ft-37ft

Overall

20905

Females

7988

F40-44

7988

Half→25K

13.1 - 15.5 mi

Top 76%
×4story building
+66ft-88ft

Overall

21634

Females

8443

F40-44

8443

25K→30K

15.5 - 18.6 mi

Top 69%
×9story building
+181ft-148ft

Overall

19733

Females

7515

F40-44

7515

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

19951

Females

7760

F40-44

7760

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

19036

Females

7348

F40-44

7348

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

20988

Females

8492

F40-44

8492

35K→23M

21.8 - 23.0 mi

Top 74%
×5story building
+23ft-63ft

Overall

20993

Females

8550

F40-44

8550

23M→24M

23.0 - 24.0 mi

Top 76%
×6story building
+12ft-82ft

Overall

21547

Females

8879

F40-44

8879

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

21189

Females

8759

F40-44

8759

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

19850

Females

8078

F40-44

8078

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

18873

Females

7533

F40-44

7533

Passing Analysis

Category:
Athletes Passed
1131
Passed By
3090
Net Change
-1959
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18092
5K → 10K125571-446#18092#18538
10K → 15K81504-423#18538#18961
15K → 20K160294-134#18961#19095
20K → Half13113-100#19095#19195
Half → 25K54569-515#19195#19710
25K → 30K237228+9#19710#19701
30K → 20M88119-31#19701#19732
20M → 21M11588+27#19732#19705
21M → 35K2982-53#19705#19758
35K → 23M60177-117#19758#19875
23M → 24M36149-113#19875#19988
24M → 40K37105-68#19988#20056
40K → 25.2M2141-20#20056#20076
25.2M → Finish7550+25#20076#20051
TOTALS11313090-1959
📊

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