Boston Marathon logo
BOSTON MARATHON 2025

Karlyn Roberts

Bib: 18013•F

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 49%
Gender (Female)
#0 / 12228
Top 35%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:24
Rank: #17939
Start → 5K
25:24 | 8:11/mi
10K· 6.21 mi
49:44
Rank: #16548 (+1391)
5K → 10K
24:20 | 7:50/mi
15K· 9.32 mi
1:14:10
Rank: #15992 (+556)
10K → 15K
24:26 | 7:52/mi
20K· 12.43 mi
1:38:29
Rank: #15323 (+669)
15K → 20K
24:19 | 7:50/mi
Half· 13.11 mi
1:43:46
Rank: #15227 (+96)
20K → Half
5:17 | 7:45/mi
25K· 15.53 mi
2:03:03
Rank: #14919 (+308)
Half → 25K
19:17 | 7:57/mi
30K· 18.64 mi
2:28:57
Rank: #14631 (+288)
25K → 30K
25:54 | 8:20/mi
20M
2:41:40
Rank: #15012 (-381)
30K → 20M
12:43 | 9:21/mi
21M
2:50:40
Rank: #14862 (+150)
20M → 21M
9:00 | 9:00/mi
35K· 21.75 mi
2:56:43
Rank: #14753 (+109)
21M → 35K
6:03 | 8:05/mi
23M
3:06:53
Rank: #14494 (+259)
35K → 23M
10:10 | 8:07/mi
24M
3:14:55
Rank: #14346 (+148)
23M → 24M
8:02 | 8:02/mi
40K· 24.85 mi
3:21:41
Rank: #14154 (+192)
24M → 40K
6:46 | 7:55/mi
25.2M
3:24:44
Rank: #14083 (+71)
40K → 25.2M
3:03 | 8:51/mi
Finish· 26.22 mi
3:32:35
Rank: #13918 (+165)
25.2M → Finish
7:51 | 7:42/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:46
Pace7:55 /mi
2nd Half
Distance13.11 mi
Time1:48:49
Pace8:18 /mi
📊Positive Split: 4.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:4425:248:1125:24
8:11
-
10K
6.21 mi11:40:0449:448:0024:20
7:50
-0:21
15K
9.32 mi12:04:301:14:107:5724:26
7:52
+0:02
20K
12.43 mi12:28:491:38:297:5524:19
7:50
-0:02
Half
13.11 mi12:34:061:43:467:555:17
7:45
-0:05
25K
15.53 mi12:53:232:03:037:5519:17
7:57
+0:12
30K
18.64 mi13:19:172:28:577:5925:54
8:20
+0:23
20M
20.00 mi13:32:002:41:408:0512:43
9:21
+1:01
21M
21.00 mi13:41:002:50:408:089:00
9:00
-0:21
35K
21.75 mi13:47:032:56:438:086:03
8:05
-0:55
23M
23.00 mi13:57:133:06:538:0810:10
8:07
+0:02
24M
24.00 mi14:05:153:14:558:078:02
8:02
-0:05
40K
24.85 mi14:12:013:21:418:076:46
7:55
-0:07
25.2M
25.20 mi14:15:043:24:448:073:03
8:51
+0:56
Finish
26.22 mi14:22:553:32:358:077:51
7:42
-1:09

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

7:42 /mi

Average Pace

8:07 /mi

Slowest Pace

9:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

13:08

6% of race

Time at Steady Pace

2:28:47

70% of race

Time at Slower Pace

50:40

24% of race

Average Pace: 8:06 /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 mi11:15:4425:248:1125:24
8:11
#17939
10K
6.21 mi11:40:0449:448:0024:20
7:50
#16548
15K
9.32 mi12:04:301:14:107:5724:26
7:52
#15992
20K
12.43 mi12:28:491:38:297:5524:19
7:50
#15323
Half
13.11 mi12:34:061:43:467:555:17
7:45
#15227
25K
15.53 mi12:53:232:03:037:5519:17
7:57
#14919
30K
18.64 mi13:19:172:28:577:5925:54
8:20
#14631
20M
20.00 mi13:32:002:41:408:0512:43
9:21
#15012
21M
21.00 mi13:41:002:50:408:089:00
9:00
#14862
35K
21.75 mi13:47:032:56:438:086:03
8:05
#14753
23M
23.00 mi13:57:133:06:538:0810:10
8:07
#14494
24M
24.00 mi14:05:153:14:558:078:02
8:02
#14346
40K
24.85 mi14:12:013:21:418:076:46
7:55
#14154
25.2M
25.20 mi14:15:043:24:448:073:03
8:51
#14083
Finish
26.22 mi14:22:553:32:358:077:51
7:42
#13918
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi179396301630114960(Top 53%)4557(Top 37%)4557(Top 83%)
10K6.21 mi3.10 mi16548+13915467+8345467+83415120(Top 53%)4608(Top 38%)4608(Top 84%)
15K9.32 mi3.11 mi15992+5565142+3255142+32514960(Top 53%)4557(Top 37%)4557(Top 83%)
20K12.43 mi3.11 mi15323+6694762+3804762+38013502(Top 48%)3818(Top 31%)3818(Top 70%)
Half13.11 mi0.68 mi15227+964708+544708+5413849(Top 49%)3988(Top 33%)3988(Top 73%)
25K15.53 mi2.42 mi14919+3084578+1304578+13013554(Top 48%)3976(Top 33%)3976(Top 73%)
30K18.64 mi3.11 mi14631+2884461+1174461+11713733(Top 48%)4218(Top 34%)4218(Top 77%)
20M20.00 mi1.36 mi15012-3814708-2474708-24718558(Top 65%)7028(Top 57%)7028(Top 129%)
21M21.00 mi1.00 mi14862+1504645+634645+6313531(Top 48%)4379(Top 36%)4379(Top 80%)
35K21.75 mi0.75 mi14753+1094598+474598+4712873(Top 45%)4092(Top 33%)4092(Top 75%)
23M23.00 mi1.25 mi14494+2594484+1144484+11410903(Top 38%)3190(Top 26%)3190(Top 58%)
24M24.00 mi1.00 mi14346+1484431+534431+5311532(Top 41%)3594(Top 29%)3594(Top 66%)
40K24.85 mi0.85 mi14154+1924363+684363+689631(Top 34%)2756(Top 23%)2756(Top 50%)
25.2M25.20 mi0.35 mi14083+714336+274336+2711019(Top 39%)3513(Top 29%)3513(Top 64%)
Finish26.22 mi1.02 mi13918+1654273+634273+6310769(Top 38%)3363(Top 28%)3363(Top 61%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21stories
+97ft-345ft

Overall

14960

Females

4557

F18-39

4557

5K→10K

3.1 - 6.2 mi

Top 53%
×5stories
+79ft-138ft

Overall

15120

Females

4608

F18-39

4608

10K→15K

6.2 - 9.3 mi

Top 53%
×3stories
+67ft-78ft

Overall

14960

Females

4557

F18-39

4557

15K→20K

9.3 - 12.4 mi

Top 48%
×5stories
+106ft-86ft

Overall

13502

Females

3818

F18-39

3818

20K→Half

12.4 - 13.1 mi

Top 49%
×2stories
+19ft-37ft

Overall

13849

Females

3988

F18-39

3988

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

13554

Females

3976

F18-39

3976

25K→30K

15.5 - 18.6 mi

Top 48%
×9stories
+181ft-148ft

Overall

13733

Females

4218

F18-39

4218

30K→20M

18.6 - 20.0 mi

Top 65%
×5stories
+64ft-50ft

Overall

18558

Females

7028

F18-39

7028

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

13531

Females

4379

F18-39

4379

21M→35K

21.0 - 21.8 mi

Top 45%
×7stories
+17ft-86ft

Overall

12873

Females

4092

F18-39

4092

35K→23M

21.8 - 23.0 mi

Top 38%
×5stories
+23ft-63ft

Overall

10903

Females

3190

F18-39

3190

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

11532

Females

3594

F18-39

3594

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9631

Females

2756

F18-39

2756

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

11019

Females

3513

F18-39

3513

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2stories
+22ft-21ft

Overall

10769

Females

3363

F18-39

3363

Passing Analysis

Category:
Athletes Passed
4760
Passed By
739
Net Change
+4021
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17939
5K → 10K141423+1391#17939#16548
10K → 15K58731+556#16548#15992
15K → 20K6778+669#15992#15323
20K → Half1026+96#15323#15227
Half → 25K35042+308#15227#14919
25K → 30K397109+288#14919#14631
30K → 20M49430-381#14631#15012
20M → 21M18535+150#15012#14862
21M → 35K12112+109#14862#14753
35K → 23M26910+259#14753#14494
23M → 24M1579+148#14494#14346
24M → 40K1942+192#14346#14154
40K → 25.2M809+71#14154#14083
25.2M → Finish17813+165#14083#13918
TOTALS4760739+4021
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing